85 eta rough misfire black soot from exhaust

[2.5-12]

ok guys -- narrowed it to a TPS or main engine harness.

injectors are OK. swapped them out, no change.

[stout90]

eh? leaking injector? oil smells like gas

[stout90]

any updates 2.5-12?


I am having the same problems and had turn around on my way to charlotte cause a half tank of gas got me only 80 miles last night. and Ive replaced all the sensors in the thermostat housing along with new O2.

disconnecting the vac line running from the FPR to the intake manifold somehow made it run well and not stumble, actually pulled fine for the first time in a while.

what could this be?

[603Racing]

I fixed the issue on my eta! I put in two new temp sensors and it runs like a champ, no black smoke, not running rich. Two of the four sensors go to the ECU, these are the two I replaced.

Part #'s
13621357414
12631279722

[2.5-12]

the extender? I just bypassed that bit with my plugs.

I have not looked much into the harness. that is a fair point though and entirely possible that something got in it while all this maintenance was under way and screwed it up bigtime

I do have a couple of ETA harnesses in my harness box I could try swapping in.

would just hate if that didnt fix it though.

[603Racing]

I was looking at the intermediate wire for the O2 sensor on my car. It has a cut in it. This is the wire that runs from the harness to the O2 sensor. You said you replaced the sensor, but what about this wire? I just ordered a new one, but they are saying two weeks before I have it. The two eta's at the local yard didn't have this wire in good condition. I'm thinking this might be the issue on my car... if not I'm looking at the cold start injector next.

[2.5-12]

no updates worth anything guys -- harness may be an issue its really hard to say. at this point I'm grabbing at straws. I have a full SuperETA harness and intake system to drop on this car but haven't yet done it out of hopes it starts co operating

I started it to move it last week, starts right up and will idle high, but will happily idle up high with no notable soot or smoke out of the tail pipe. if I press the gas just slightly it violently bucks and sometimes dies. if I repeatedly jab the gas, I can get it to rev a little and get the car moving but its a huge PITA.

I'd love to hear other things to try though. I have tons of parts and parts cars so i can try just about anything within reason.

[603Racing]

...as do I.

I'm wondering if you have a harness (wiring) issue.

[THQ]

any updates? I have an elevated issue related to this.

[2.5-12]

You swapped the TPS, but did you test it electronically and make sure it's physically adjusted properly? I watched your videos and it was interesting to me how it revved fine with a lot of throttle, but ran like dick when you only gave it a little bit.

Also, I've seen no mention of the coolant temp sensor ITT. I'd test/change it if you haven't already. Make sure it's OEM too (Bosch). If it's not, replace it no matter what.

Just did some reading: early ETA's have 4 sensors/switches on the T-stat housing. Does yours? One is the sender for the temp gauge, one feeds the DME with coolant temp info, one operates the cold-start injector, and the last decides if the engine should run in open or closed loop (i.e. lets the DME start accepting information from the o2 sensor).

^Probably should verify that paragraph, but it's late and I'm getting lazy. Should be close at least.

I wish I had a second set of reference sensors to try again, but I do have more TPSs. have tried two with no change.

I do have the early thermo with 4 sensors, swapped all four from my perfect running ETA.

picking up a SETA electronic swap setup this weekend hopefully I get it sorted before I resort to swapping all that crap in :x

[EatsHondas]

You swapped the TPS, but did you test it electronically and make sure it's physically adjusted properly? I watched your videos and it was interesting to me how it revved fine with a lot of throttle, but ran like dick when you only gave it a little bit.

Also, I've seen no mention of the coolant temp sensor ITT. I'd test/change it if you haven't already. Make sure it's OEM too (Bosch). If it's not, replace it no matter what.

Just did some reading: early ETA's have 4 sensors/switches on the T-stat housing. Does yours? One is the sender for the temp gauge, one feeds the DME with coolant temp info, one operates the cold-start injector, and the last decides if the engine should run in open or closed loop (i.e. lets the DME start accepting information from the o2 sensor).

^Probably should verify that paragraph, but it's late and I'm getting lazy. Should be close at least.

[crazyman]

Well crap. Back to the thinking tank.

[2.5-12]

I'm guessing its still there because when unplugged, each of the flywheel reference sensors seem to make it run worse or stop the engine all together when unplugged which makes sense.

[crazyman]

Have you looked at the flywheel to see if those firing pins are still there and intact? That would cause a timing issue witch could partially be overlooked as something else perhaps. I heard that there prone to falling out, have never seen one or know what happens. I'm sure has happened to someone on here maybe, worth checking. Imop though.

[2.5-12]

final bump before I try and convert this pig to motronic 1.1