Lack of drive on hills

BUSTED100 · 01-09-08, 04:45 AM

I have a 1HDT auto 80. When out wheeling if I go to drive off from a stand still on any incline/angle, the revs will not go over 1200RPM and there is no drive. It doesn't happen all the time but enough to piss me off. The motor, turbo are all fine, the injectors and fuel pump have been rebuilt, No mater if the gas pedal is flat to the floor the rev's don't get any higher, put it into N and the revs are back.

Help me PLEASE
Any Ideas?

Thanks

roscoFJ73 · 01-09-08, 06:40 AM

Quote:

Originally Posted by BUSTED100

I have a 1HDT auto 80. When out wheeling if I go to drive off from a stand still on any incline/angle, the revs will not go over 1200RPM and there is no drive. It doesn't happen all the time but enough to piss me off. The motor, turbo are all fine, the injectors and fuel pump have been rebuilt, No mater if the gas pedal is flat to the floor the rev's don't get any higher, put it into N and the revs are back.

Help me PLEASE
Any Ideas?

Thanks

Can you hand throttle it by pulling on the lever at the fuel pump? Was it there before the pump rebuild?

BUSTED100 · 01-09-08, 06:51 AM

yes, the problem was there before the rebuild of pump, injectors and the replacement of the turbo. it is a little sluggish of the mark, but I'm getting used to it but when your out wheeling and you stop behind someone and you go to take off ......yeh

gbcruiser · 01-09-08, 10:42 AM

So if you rev the engine in N it's fine, in D you get this intermittent problem only on inclines?

I don't know much about the 80, but there may be a 'limp' mode that's been activated, which keeps revs below a certain rpm just to get you home when something is amiss...

canucksafari · 01-09-08, 10:58 AM

I would check out the TPS. I have seen two similar cases like this on a TD4.2 - lots of revs while parked but put it in gear and bounce it around and you get nothing over a high idle speed. In one case it had to be replaced because it was on an auto (needed for the tranny to work) and in the second case on a standard the owner just removed it. On the Bosch rotary type pump, you will find it on top. I don't have a clue on how to test these things but maybe Rosco knows.

Tapage · 01-09-08, 12:19 PM

Interesting issue .. I never ear about it .. it's a tranny issue then

canucksafari · 01-09-08, 01:11 PM

Quote:

Originally Posted by Tapage

Interesting issue .. I never ear about it .. it's a tranny issue then

No and yes. Yes in terms that the TPS helps the auto tranny shift correctly in relation to throttle. No, in terms that when these things go they control the butterfly valve. Just like MrMOMo's stuck buttefly valve and no power, a messed up TPS can keep that buttefly valve closed when it shouldn't be.
http://forum.ih8mud.com/diesel-tech-...brownbear.html

jus cruzin · 01-09-08, 02:55 PM

Quote:

Originally Posted by BUSTED100

I have a 1HDT auto 80. When out wheeling if I go to drive off from a stand still on any incline/angle, the revs will not go over 1200RPM and there is no drive. It doesn't happen all the time but enough to piss me off. The motor, turbo are all fine, the injectors and fuel pump have been rebuilt, No mater if the gas pedal is flat to the floor the rev's don't get any higher, put it into N and the revs are back.

Help me PLEASE
Any Ideas?

Thanks

check your gearbox/torqe converter oil levels

BUSTED100 · 01-10-08, 02:00 AM

levels are fine, check that once back on the flat

prado t · 01-10-08, 01:04 PM

It does seem like a limp mode. I am not to familiar with the 80 , but it could be a sensor if it happens on an incline it sounds like a fluid level. I heard that you checked all the fluids . coolent ? brake,?

mac · 01-10-08, 01:14 PM

What year is the 80? A440 or A442 tranny? That will determine whether or not you have a TPS. That said, no 1HDT is electronically controlled so I can't see why it wouldn't rev passed 1200rpm even if your TPS was malfunctioning. The TPS sends a signal to the tranny ECU and doesn't control engine speed. I suppose if the TPS was telling the tranny to put itself in the wrong gear it, i.e., top gear, it could cause it to bog badly.

I would be looking at a fuel supply/ filter blockage.

BUSTED100 · 01-10-08, 03:39 PM

1993 model

roscoFJ73 · 01-10-08, 05:26 PM

I would eliminate the fuel lines and fuel pick up 1st.
There might be something like piece of plastic in the tank wrapping around the fuel pick up on an incline.

mac · 01-10-08, 08:41 PM

1993= A442 electronically controlled tranny w/TPS.

BUSTED100 · 01-10-08, 09:58 PM

Quote:

Originally Posted by mac

1993= A442 electronically controlled tranny w/TPS.

sorry not sure what the TPS is

mac · 01-10-08, 11:40 PM

Throttle position sensor.
I'm not sure that is the terminology that Toyota uses on the 1HDT but it is essentially a sensor on the throttle linkage of your injector pump that lets your tranny know what gear it should be in.

BUSTED100 · 01-11-08, 03:45 AM

Mac, would that only be affected when on the incline?

mac · 01-11-08, 11:00 AM

I personally doubt it but stranger things have happened. I only raise the TPS issue because it was mentioned earlier by other posters as having caused issues with other vehicles- I think a Nissan Patrol was mentioned. Maybe just check it for proper adjustment and make sure it is secure and the plug contacts are ok.

I, as I stated before, would be looking first at a fuel supply issue. Check your fuel filter. When you experience this issue again, pull the fuel line to the injector pump and see if you can hand pump a good quantity of fuel using the hand primer on top of the filter. As Rosco mentioned, you may have something in your tank. Any enemies??

Tapage · 01-11-08, 05:31 PM

It's the TPS the Black part over the IP with blue letters Toyota / Denso ?

canucksafari · 01-11-08, 06:10 PM

IT looks similar to the TPS on the Patrol:

There are quite a few threads on Outerlimits4x4 of TBS faults causing similar problems in both Toyota and Nissan diesels. They all say that the TBS also controls the butterfly valve's opening and closing. I have no first hand experience with it. only repeating what i have read. I asume the quick test is to observe the butterfly valve on the intake when Busted100 has the problem. If he can't bring the revs past 1200 when sitting on the side hill and the butterfly remains closed then I would assume it is probably related to the control mechanism of the butterfly valve. But there must be another way of testing if the TBS is working properly. I just don't know it...

BUSTED100 · 01-11-08, 09:26 PM

I'll ask some mates regard s to testing this TPS, some one may know

thanks, will let you know how I go

mac · 01-11-08, 10:04 PM

No butterfly on the 1HDT.

01-09-08, 04:45 AM	#1
BUSTED100 IH8MUD Rookie Join Date: Apr 2005 Location: Australia Posts: 68	Lack of drive on hills I have a 1HDT auto 80. When out wheeling if I go to drive off from a stand still on any incline/angle, the revs will not go over 1200RPM and there is no drive. It doesn't happen all the time but enough to piss me off. The motor, turbo are all fine, the injectors and fuel pump have been rebuilt, No mater if the gas pedal is flat to the floor the rev's don't get any higher, put it into N and the revs are back. Help me PLEASE Any Ideas? Thanks __________________ V8 100 GXL - F&R AIR LOCKERS, SNORKEL, ARB FRONT BAR, KAYMAR REAR BAR, WINCH, IPF LIGHTS & 33" MTR's. T/D 80 Saharra - F&R e-LOCKERS, SNORKEL, ARB FRONT BAR, KAYMAR REAR BAR, WINCH, IPF LIGHTS, 35" MTZ's & 50L WAECO FRIDGE

01-09-08, 06:51 AM	#3
BUSTED100 IH8MUD Rookie Join Date: Apr 2005 Location: Australia Posts: 68	yes, the problem was there before the rebuild of pump, injectors and the replacement of the turbo. it is a little sluggish of the mark, but I'm getting used to it but when your out wheeling and you stop behind someone and you go to take off ......yeh __________________ V8 100 GXL - F&R AIR LOCKERS, SNORKEL, ARB FRONT BAR, KAYMAR REAR BAR, WINCH, IPF LIGHTS & 33" MTR's. T/D 80 Saharra - F&R e-LOCKERS, SNORKEL, ARB FRONT BAR, KAYMAR REAR BAR, WINCH, IPF LIGHTS, 35" MTZ's & 50L WAECO FRIDGE

01-09-08, 10:42 AM	#4
gbcruiser IH8MUD Regular Join Date: May 2007 Location: Vancouver Island Posts: 308	So if you rev the engine in N it's fine, in D you get this intermittent problem only on inclines? I don't know much about the 80, but there may be a 'limp' mode that's been activated, which keeps revs below a certain rpm just to get you home when something is amiss... __________________ http://www.4wdtraveller.com/ 4x4 travel, adventure, news, and reviews.

01-09-08, 10:58 AM	#5
canucksafari IH8MUD Lifer Join Date: Dec 2006 Location: Abby Posts: 2,340	I would check out the TPS. I have seen two similar cases like this on a TD4.2 - lots of revs while parked but put it in gear and bounce it around and you get nothing over a high idle speed. In one case it had to be replaced because it was on an auto (needed for the tranny to work) and in the second case on a standard the owner just removed it. On the Bosch rotary type pump, you will find it on top. I don't have a clue on how to test these things but maybe Rosco knows. __________________ John G. 姉 Join the Import Vehicle Owners Association of Canada: Fight for what is right

01-10-08, 02:00 AM	#9
BUSTED100 IH8MUD Rookie Join Date: Apr 2005 Location: Australia Posts: 68	levels are fine, check that once back on the flat __________________ V8 100 GXL - F&R AIR LOCKERS, SNORKEL, ARB FRONT BAR, KAYMAR REAR BAR, WINCH, IPF LIGHTS & 33" MTR's. T/D 80 Saharra - F&R e-LOCKERS, SNORKEL, ARB FRONT BAR, KAYMAR REAR BAR, WINCH, IPF LIGHTS, 35" MTZ's & 50L WAECO FRIDGE

01-10-08, 01:04 PM	#10
prado t IH8MUD Addict Join Date: Mar 2007 Location: vancouver B.C. Canada TLCA# 17424 Posts: 877	It does seem like a limp mode. I am not to familiar with the 80 , but it could be a sensor if it happens on an incline it sounds like a fluid level. I heard that you checked all the fluids . coolent ? brake,? __________________ 2.5 OME Heavy coils, ARB rear locker PRADO STOLEN 89 BJ74 ARB lockers front and rear 4" ZEAL lift, 24v M8000 winch ARB bull bar, Marks 108 to 1 HI 305 to 1 low

01-10-08, 01:14 PM	#11
mac rust and moth consumables Join Date: Jan 2005 Location: Wet Coast Posts: 844	What year is the 80? A440 or A442 tranny? That will determine whether or not you have a TPS. That said, no 1HDT is electronically controlled so I can't see why it wouldn't rev passed 1200rpm even if your TPS was malfunctioning. The TPS sends a signal to the tranny ECU and doesn't control engine speed. I suppose if the TPS was telling the tranny to put itself in the wrong gear it, i.e., top gear, it could cause it to bog badly. I would be looking at a fuel supply/ filter blockage. __________________ -Peter Mac- 1990 HDJ81 1997 40th 1967 Norton Atlas 1986 Yamaha RZ350 1996 Ducati 900SS SP Ya...it's like crack to me... www.bestinshowexhibits.com

01-10-08, 03:39 PM	#12
BUSTED100 IH8MUD Rookie Join Date: Apr 2005 Location: Australia Posts: 68	1993 model __________________ V8 100 GXL - F&R AIR LOCKERS, SNORKEL, ARB FRONT BAR, KAYMAR REAR BAR, WINCH, IPF LIGHTS & 33" MTR's. T/D 80 Saharra - F&R e-LOCKERS, SNORKEL, ARB FRONT BAR, KAYMAR REAR BAR, WINCH, IPF LIGHTS, 35" MTZ's & 50L WAECO FRIDGE

01-10-08, 05:26 PM	#13
roscoFJ73 Diesel for blood Join Date: Jul 2003 Location: west australia Posts: 6,523	I would eliminate the fuel lines and fuel pick up 1st. There might be something like piece of plastic in the tank wrapping around the fuel pick up on an incline. __________________ HZJ75 cab chassis 95 model ,stocker FJ73+1HZ Diesel NEW GEARBOX 1HZ =same power as 3F with 30% better fuel economy 2in Dobinsons lift.Powerdown adj shocks 33 in BFG A/T HJ61 with slidin windas regrettfully SOLD:( Volvo 740 GL

01-10-08, 08:41 PM	#14
mac rust and moth consumables Join Date: Jan 2005 Location: Wet Coast Posts: 844	1993= A442 electronically controlled tranny w/TPS. __________________ -Peter Mac- 1990 HDJ81 1997 40th 1967 Norton Atlas 1986 Yamaha RZ350 1996 Ducati 900SS SP Ya...it's like crack to me... www.bestinshowexhibits.com

01-10-08, 11:40 PM	#16
mac rust and moth consumables Join Date: Jan 2005 Location: Wet Coast Posts: 844	Throttle position sensor. I'm not sure that is the terminology that Toyota uses on the 1HDT but it is essentially a sensor on the throttle linkage of your injector pump that lets your tranny know what gear it should be in. __________________ -Peter Mac- 1990 HDJ81 1997 40th 1967 Norton Atlas 1986 Yamaha RZ350 1996 Ducati 900SS SP Ya...it's like crack to me... www.bestinshowexhibits.com

01-11-08, 03:45 AM	#17
BUSTED100 IH8MUD Rookie Join Date: Apr 2005 Location: Australia Posts: 68	Mac, would that only be affected when on the incline? __________________ V8 100 GXL - F&R AIR LOCKERS, SNORKEL, ARB FRONT BAR, KAYMAR REAR BAR, WINCH, IPF LIGHTS & 33" MTR's. T/D 80 Saharra - F&R e-LOCKERS, SNORKEL, ARB FRONT BAR, KAYMAR REAR BAR, WINCH, IPF LIGHTS, 35" MTZ's & 50L WAECO FRIDGE

01-11-08, 11:00 AM	#18
mac rust and moth consumables Join Date: Jan 2005 Location: Wet Coast Posts: 844	I personally doubt it but stranger things have happened. I only raise the TPS issue because it was mentioned earlier by other posters as having caused issues with other vehicles- I think a Nissan Patrol was mentioned. Maybe just check it for proper adjustment and make sure it is secure and the plug contacts are ok. I, as I stated before, would be looking first at a fuel supply issue. Check your fuel filter. When you experience this issue again, pull the fuel line to the injector pump and see if you can hand pump a good quantity of fuel using the hand primer on top of the filter. As Rosco mentioned, you may have something in your tank. Any enemies?? __________________ -Peter Mac- 1990 HDJ81 1997 40th 1967 Norton Atlas 1986 Yamaha RZ350 1996 Ducati 900SS SP Ya...it's like crack to me... www.bestinshowexhibits.com

01-11-08, 06:10 PM	#20
canucksafari IH8MUD Lifer Join Date: Dec 2006 Location: Abby Posts: 2,340	IT looks similar to the TPS on the Patrol: There are quite a few threads on Outerlimits4x4 of TBS faults causing similar problems in both Toyota and Nissan diesels. They all say that the TBS also controls the butterfly valve's opening and closing. I have no first hand experience with it. only repeating what i have read. I asume the quick test is to observe the butterfly valve on the intake when Busted100 has the problem. If he can't bring the revs past 1200 when sitting on the side hill and the butterfly remains closed then I would assume it is probably related to the control mechanism of the butterfly valve. But there must be another way of testing if the TBS is working properly. I just don't know it... __________________ John G. 姉 Join the Import Vehicle Owners Association of Canada: Fight for what is right

01-11-08, 09:26 PM	#21
BUSTED100 IH8MUD Rookie Join Date: Apr 2005 Location: Australia Posts: 68	I'll ask some mates regard s to testing this TPS, some one may know thanks, will let you know how I go __________________ V8 100 GXL - F&R AIR LOCKERS, SNORKEL, ARB FRONT BAR, KAYMAR REAR BAR, WINCH, IPF LIGHTS & 33" MTR's. T/D 80 Saharra - F&R e-LOCKERS, SNORKEL, ARB FRONT BAR, KAYMAR REAR BAR, WINCH, IPF LIGHTS, 35" MTZ's & 50L WAECO FRIDGE

01-11-08, 10:04 PM	#22
mac rust and moth consumables Join Date: Jan 2005 Location: Wet Coast Posts: 844	No butterfly on the 1HDT. __________________ -Peter Mac- 1990 HDJ81 1997 40th 1967 Norton Atlas 1986 Yamaha RZ350 1996 Ducati 900SS SP Ya...it's like crack to me... www.bestinshowexhibits.com

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode