put a 1k resistor in it today. bent the resistor stems to fold up into the disconnector pieces then wrapped them both in electrical tape to keep them from touching each other. think this sounds sufficient??
Disable the EGR system the (mostly) Toyota way
- Thread starter Ebag333
- Start date
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I have been studying this thread and thought I had a pretty good understanding of the mod - and was going out to buy some resistors today, but now I'm confused. A lower Ohm resistor (1K vs 4.7k) would tell the ECU that the temp is even higher, right. He should go up to something closer to 10K Ohms to tell the ECU that the temps are lower and to stop the P0402 - at least that is what I learned from this thread.
I am planning on trying an 8K resistor since it is between the 4.7k and 10k that have mostly (except for this 4.7k failure) been running without CELs...
I am planning on trying an 8K resistor since it is between the 4.7k and 10k that have mostly (except for this 4.7k failure) been running without CELs...
I have now ben running for about 5 months, all kinds of weather from -48*C to +20*C. 4.7k resistor, NO CEL. Truck is running great!
Just an update!!
Just an update!!
Need some help with this. A few weeks ago the vacum hose from the egr to the vsv(?) split causing a nasty noise. When trying to remove it the bottom nipple of the vsv broke off.
I thought to heck with the EGR the truck is running better without it. I pulled the vacum hoses as directed in this thread but there is still flow thru the EGR. Is this normal? When the HVAC is on outside air it's picking up the exhaust fumes from the still flowing EGR valve and it's getting annoying.
I thought to heck with the EGR the truck is running better without it. I pulled the vacum hoses as directed in this thread but there is still flow thru the EGR. Is this normal? When the HVAC is on outside air it's picking up the exhaust fumes from the still flowing EGR valve and it's getting annoying.
Kupp, I got the 4.7k just like you have. I got this CEL reading P0402 2-3 times. have any ideas as to why thats happening? Ebag said go with a lower resistor 1k, so I've got that in there now.
Sorry, I have not idea. I'm by no means an expert. I just tried what was suggested to me and it seems to be working. I am planning on supercharging my truck soon, so I will let you know if anything pops up for me, but it's been a good while, and nothing yet!
Supercharger coming within the month!
BA.. how much did that run you? putting it in yourself? I wonder, bc I didn't sauder the resistor to the connecter, so maybe the two connectors were touching... you think that might cause the P0402
- Thread starter
- #208
Did you remove the vacuum hoses completely?
If you do that then you need to plug up the EGR modulator (with something like JB weld) so that it's blocked and won't open the EGR valve.
hi guys!! i just installed my turbo 1week ago my question is the turbo manifold dosent have the port or gap for the egr what else i need to do to disable the egr system?
So, this thread has been a little hard to follow.
My truck has no EGR temp sensor, just the little OEM plug in the harness. '93 OBD I.
So all I need to do is block the vacuum from getting to the EGR valve? Theory being, my ECU has no was to tell whether it is active or not?
My truck has no EGR temp sensor, just the little OEM plug in the harness. '93 OBD I.
So all I need to do is block the vacuum from getting to the EGR valve? Theory being, my ECU has no was to tell whether it is active or not?
- Thread starter
- #211
If your truck is a "federal" 80 (with no temp sensor), then yes.
Did I do it right?
So I went to the junkyard and found a 93 cruiser that had the grey plastic piece (the one that looks partly broken off on the picture of post#1). I took that piece and plugged it into the ECU side of the EGR temp plug (not the one going to the intake manifold). Did I do this right? If someone could bring this down to barney level, I would greatly appreciate it. Thanks!
I have a 94 cruiser, which I believe is OBDI. I know for sure that the grey plastic piece was plugged into the ECU side.
Chan
So I went to the junkyard and found a 93 cruiser that had the grey plastic piece (the one that looks partly broken off on the picture of post#1). I took that piece and plugged it into the ECU side of the EGR temp plug (not the one going to the intake manifold). Did I do this right? If someone could bring this down to barney level, I would greatly appreciate it. Thanks!
I have a 94 cruiser, which I believe is OBDI. I know for sure that the grey plastic piece was plugged into the ECU side.
Chan
Just a little update on my EGR status. I recently pulled the injectors for cleaning, so while I was in there I took the liberty of definitively blocking off the EGR valve.
I discovered that a dime fits very snug in the EGR valve where it connects to the large down pipe that goes to the head. I ended up placing 2 or 3 dimes into the EGR valve and then I pounded them securely in place. I know that when the metal is hot and expands, there will be the possibility that some hot exhaust might be able to leak through, but this modification, plus blocking the vacume lines with BB's should make the flow from the pipe to the EGR valve negligible. Also, there is no possibility that the dimes could slide down the pipe and into the head because the pipe is a smaller diameter than a dime.
To date, my EGR valve has remained warm to cool, and can easily be touched with my bare hands.
So far, no P0401's or P0402's or any other CEL's. Gas mileage has improved, but this can't be attributed to this mod because I did way too many other modifications at the time (clean injectors, new FPR, full length roof rack removal, Aisin hubs, front driveline removal etc).
- Thread starter
- #214
That disables the temp sensor. It does not disable the EGR system however, as the EGR system is controlled by the vacuum lines.
Did I re-route the vacuum lines correctly?
It looks like I have successfully disabled (or tricked) the temperature sensor. As far as the vacuum lines are concerned, does this look right? Thanks!
It looks like I have successfully disabled (or tricked) the temperature sensor. As far as the vacuum lines are concerned, does this look right? Thanks!
I'm in the process of a motor rebuild. Can I just leave of the entire EGR mechanism and install a block off plate on the head?
alia176
SILVER Star
alia176
SILVER Star
what resistor did you end up using? 4.7k ohm or 1k ohm?
It's actually a 3.9K ohm resistor. Seems to be working well in the 10 months I've been using it. I did throw a P0402 right after a cold start in below zero weather last Dec. I reset the code immediately with the SG and it never came back. That was the only I've had CEL.
alia176
SILVER Star
Copy that. 3.9k ohm, wow...let me see if I can come up with that combo!
Thanks.
edit: never mind, I see that Radio Crack has them. I'll pick up a package today.
Thanks.
edit: never mind, I see that Radio Crack has them. I'll pick up a package today.
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