Well hello all, this is my first run into the Fiero world. Well on to bussiness, I recently aquired an 87 GT with the 2.8 auto. I have replaced the MAP sensor, TPS, AIC, plugs/wires, cap/rotor, pickup coil, HEI unit, wireloom, TB (Holley), ECM, EGR vavle, vaccum lines, and a few other things along the way. My problem is the car is running stupidly rich, like black smoke just pours out (not Blue). and the car has no power under 3000 rpm. If I nail it at a stop it sputters and dies. I'm extremely lost. I have no trouble codes and I just adjusted the timing but nothing. I've done all I can think of. Please Help!! Thanks to all who post inb advance.

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I love seeing all those little imports running around, with everything on the outside, but nothing under the HOOD!!

Did you replace the Oxygen Sensor?

It helps the ECM with the lean/rich fuel mixture so if it's bad that could be the problem.

Oh, and welcome to the forum.

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Where will the road take you today?

Sorry I would have added that to the list if I would have thought about it. And thanks for the invite.

i can only think of a leaking cold start injector.
or the pressure regulator is stuck.

Posibubly the 02 sensor or the IAC valve.Try pulling the codes and see what it says.

[This message has been edited by James Bond 007 (edited 02-09-2004).]

Sorry again guys, I replaced the fuel pressure regulator, and read the codes (nothing). So far as I know the V6's didn't have a cold start injenctor. Just for insite, I replaced the whole ECM becasue I got a code 53 (prom failure) so I replaced the whole thing.

Just as a thought did the ECM replacemnt change anything? Was the part # exactly the same as the one that came out? Many others will fit the connection but are wrong internally. Was it the correct prom inside that ECM? It also needed to be the same part # or an updated part number.

When you said it was not throwing a code it sent up a red flag. Most runability issues will eventually cause a code.

new prom and lots of other stuff. Yea check o2 sensor. Other stuff seems to be new.

One thing it could be is bad injectors. A bad spray pattern on the injector will cause the engine to run rich as it is not properly atomizing. If so fuel is not getting burned properly so it will run rich.

You put a new FPR on it but I would hook a guage up to it and see what the pressure is.

Hope this helps. I am a noob and wouldnt' mind a plus.

Steve

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newbie extreme

The cold start injector is under the throttle body, next to the distributor running into the manifold. look for the steel tube and the plug, can't miss it.

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Ed

http://hometown.aol.com/idomy0wnracing

quote Originally posted by IDoMy0wn Racing: The cold start injector is under the throttle body, next to the distributor running into the manifold. look for the steel tube and the plug, can't miss it.

I can't think of the sensor(s) off the top of my head, but possibly one of the sensors that reads temp and tells the computer how much fuel to give the engine? Maybe they are reading cold and dumping too much fuel in.

Check the vacuum line going to the fuel regulator. If there is an air leak in the vacuum line to the fuel regulator, it can’t reduce the amount of fuel pressure to the injectors and it will have much fuel pressure to the injectors at less then WOT. (Wide Open Throttle)

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Ed

http://hometown.aol.com/idomy0wnracing

I have seen the fuel preasure regulator start leaking though the diapham. With the car running pull the vacum line. The vacume line at the regulator show be dry. If it is wet the engine is sucking fuel though the diapham. This could cause a rich mixture.

Well I replaced all the vaccum lines so there good. There's no fuel coming out if the vaccum line to the FPR. As for the computer I replaced it with a stock unit out of an 86 Fiero GT 2.8. Thanks again guys for the help