Another Bogging down issue

[ADEN]

Check TPS idle switch resistance while throttle is in the middle if there is a smaller value the idle switch stuck due to oil in it.

Try disconnecting TPS and see if it revs smoother.

[completelyrevlimited]

Check TPS idle switch resistance while throttle is in the middle if there is a smaller value the idle switch stuck due to oil in it.

Try disconnecting TPS and see if it revs smoother.

No change on it unplugged, heard it was suppose to be in limp mode, couldn't even rev open throttle. Also tested it, seems working.

[It's Soda Not Pop]

I meant to ask do you have a 13 button obc?

[completelyrevlimited]

I meant to ask do you have a 13 button obc?

I do, I thought the code feature might be causing it, but theoretically it would stop both spark and fuel, or am I wrong?

[It's Soda Not Pop]

I think it only stops the fuel.

[It's Soda Not Pop]

https://www.r3vlimited.com/board/forum/e30-technical-forums/general-technical/49808-obc-immobilizer-bypass

[It's Soda Not Pop]

Hell at this point I would at least try it

[completelyrevlimited]

Hell at this point I would at least try it

Will take a look at that when I get the chance as well. Especially if it only stops fuel. Thanks!

[It's Soda Not Pop]

No worries

[Tom Galloway]

Do you have a Bentley book ? In 3-19 they say it may be coolant temp, oxygen sensor, charcoal canister purge valve, clogged injectors. Idle air valve , intake leaks, , and a couple more . IMHO try some "Sea Foam" cleaner in the fuel. You can pour it in the gas and / or use the spray can by drilling a small hole in the boot and inject directly into the running motor - seal the boot with silicone.

Very frustrating, I've been there. E 30's are so tough that I think the main problems could be reduced to either dirt or leaks. Good luck

tg

[Caperix]

Going through this myself on my car. We sent it out for paint, when we got it back the car would not start due to a bad crank sensor. Put a crank sensor in it & it ran rough from a broken intake rocker. Replaced the rocker arms now I have a hot misfire when accelerating. Same issue as you with the plugs looking white & lean.
I read some older posts about the vibration damper getting play in it & losing crank signal. Mine felt tight & does not seam to move when the engine is running. It would be worth checking on yours. I need to check the cps gap on mine to make sure the aftermarket one is not sitting wrong. I have a scan tool that will read signals from the dme but nothing seems off, it is a very slow stream though.
update this with your finding & ill update if I find anything on mine as we could be chasing the same problem.

[Caperix]

I thought I made some progress on mine. My cat had a bit of a rattle to it so I disconnected the exhaust at the manifolds & the misfire seemed to stop. So I thought that bad rocker arm had melted the cat. So today I cut the cat off the car so I could run with the o2 sensor connected. The cat was hallow, so the cat had melted but had been pushed out the exhaust. Unfortunately once the engine warmed up the misfire was still present. So either the o2 sensor was damaged or I did not let it run long enough with the exhaust disconnected for the issue to occur.

[Caperix]

I thought I made some progress on mine. My cat had a bit of a rattle to it so I disconnected the exhaust at the manifolds & the misfire seemed to stop. So I thought that bad rocker arm had melted the cat. So today I cut the cat off the car so I could run with the o2 sensor connected. The cat was hallow, so the cat had melted but had been pushed out the exhaust. Unfortunately once the engine warmed up the misfire was still present. So either the o2 sensor was damaged or I did not let it run long enough with the exhaust disconnected for the issue to occur.

[completelyrevlimited]

I thought I made some progress on mine. My cat had a bit of a rattle to it so I disconnected the exhaust at the manifolds & the misfire seemed to stop. So I thought that bad rocker arm had melted the cat. So today I cut the cat off the car so I could run with the o2 sensor connected. The cat was hallow, so the cat had melted but had been pushed out the exhaust. Unfortunately once the engine warmed up the misfire was still present. So either the o2 sensor was damaged or I did not let it run long enough with the exhaust disconnected for the issue to occur.

How are your injectors, have you done the necessary continuity tests? Checked c191 for corrosion, etc? I believe I've narrowed my problem down, but waiting for parts now.

[Caperix]

I put a set of eBay injectors in chasing my misfire from the bad intake rocker as the spark plug was fuel fouled at that time. Not that that rules the injectors out. No visible corrosion on the injector wiring, the engine ground is looking a little green but adding an extra ground from the valve cover to ground point on the right strut tower did not make a difference. I need to hook a fuel pressure gauge back up too see if pressure is dropping when the issue happens.