Just get her drivable (2 Viewers)
- Thread starter onemanarmy
- Start date
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RUSH55
SILVER Star
When was the last time you ran an overhead?
RUSH55
SILVER Star
….and while you’re at it, setup a dial indicator and measure the lift of your cam lobes to be sure one or more hasn’t gone flat or some other valvetrain wear hasn’t occurred.
Does the AFI use an o2 sensor?
Cars that are running lean run hotter.
Maybe take the belt off and see if you can move the water pump freely.
Cars that are running lean run hotter.
Maybe take the belt off and see if you can move the water pump freely.
- Thread starter
- #305
Still messing around with it, no solution yet.
I think it's not getting enough juice, so next is a FJ60 alternator.
Then maybe back to carb for simplicities sake.
But she still looks good.
I think it's not getting enough juice, so next is a FJ60 alternator.
Then maybe back to carb for simplicities sake.
But she still looks good.
bobm
WTF, WTF, WTF!!!!
Right color 
- Thread starter
- #307
Does the AFI use an o2 sensor?
Cars that are running lean run hotter.
Maybe take the belt off and see if you can move the water pump freely.
It does use an O2. I replaced the AFI supplied one with a Bosch unit. No change. Yea....it's running lean and hot for some reason....still digging in.
IME, Bosch O2 sensors are hot garbage. I had one burn out during its first run Denso ones are much better.
- Thread starter
- #309
I got a Bosch 13077....Rock auto says Bosch is an OE supplier.
I'll try the equivalent Denso.. 2343005
I'll try the equivalent Denso.. 2343005
- Thread starter
- #310
Small update
Changed to a Denso O2 sensor, new fuel pump, and new GM Map sensor. Each of these was changed 1 at a time and no change.
It will sit and idle great all day. It'll rev up and down great when in neutral. No smoke, no weird smells, no odd noises.....sings like a sewing machine.
As soon as I put it in 1st gear and try to start going, it falls on its face. It'll stall out. When I try and get aggresive with the throttle, it'll backfire a bit through the TBI unit (no flames, just a 'pop'). It also gets up to temp quicker, and gets too hot, by feel and by the gauge. Once I do get going by giving it a lot of gas and feathering the clutch, it feels like I've got a 2000lb trailer behind me in each gear. It just won't go. Best I can tell its running lean under load and I don't know why. This just happend overnight about a year ago and it's strange.
I guess my next step is to check compression and timing, even though I haven't touched the distributor and it's tight.
Changed to a Denso O2 sensor, new fuel pump, and new GM Map sensor. Each of these was changed 1 at a time and no change.
It will sit and idle great all day. It'll rev up and down great when in neutral. No smoke, no weird smells, no odd noises.....sings like a sewing machine.
As soon as I put it in 1st gear and try to start going, it falls on its face. It'll stall out. When I try and get aggresive with the throttle, it'll backfire a bit through the TBI unit (no flames, just a 'pop'). It also gets up to temp quicker, and gets too hot, by feel and by the gauge. Once I do get going by giving it a lot of gas and feathering the clutch, it feels like I've got a 2000lb trailer behind me in each gear. It just won't go. Best I can tell its running lean under load and I don't know why. This just happend overnight about a year ago and it's strange.
I guess my next step is to check compression and timing, even though I haven't touched the distributor and it's tight.
Sounds like your spark isn't advancing.
- Thread starter
- #312
Yea....I'm thinking timing/distributor issues
- Thread starter
- #313
Talked with AFI again...they recommend a new ignition module. We'll see. Throwing parts at it is something I guess.
Got to looking a bit deeper at the HEI distributor...and the oil leak is worse. Oil is working itself up the distributor shaft and making a mess. I only see 1 oring and a gasket. Is this correct? Oil is getting up into the distributor and wiring.... which is strange, but don't think that is causing my problems.
Does anything else look off? I'm going to try and install a new o ring and make a new gasket before I reinstall it, and change the ignition module.
Got to looking a bit deeper at the HEI distributor...and the oil leak is worse. Oil is working itself up the distributor shaft and making a mess. I only see 1 oring and a gasket. Is this correct? Oil is getting up into the distributor and wiring.... which is strange, but don't think that is causing my problems.
Does anything else look off? I'm going to try and install a new o ring and make a new gasket before I reinstall it, and change the ignition module.
Are you using the vacuum advance, and could you be using the wrong port and advancing too early?
What's all welding for, I've never seen that before?
bobm
WTF, WTF, WTF!!!!
Ya that ain't right
- Thread starter
- #317
This is an HEI distributor sent to me by AFI, and there are no vacuum ports. (ECM controlled spark). This is the first time I've dug into it. Looks a bit hacked to me, but I don't know much.
Last edited:
- Thread starter
- #318
But.....it ran great for about a year, then went to crap overnight.
Sounds like you own an FJ55
RUSH55
SILVER Star
It’s not rocket science
