Serious problem
Printed From: West Coast Fieros
Category: Technical Topics Forum
Forum Name: Technical Questions and Discussions
Forum Description: Got a technical question about your fiero? ask it here.
URL: http://www.westcoastfieros.com/forum/forum_posts.asp?TID=1890
Printed Date: 24 April 2025 at 9:26am
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Topic: Serious problem
Posted By: mxracer208
Subject: Serious problem
Date Posted: 03 June 2010 at 10:46pm
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my 86 GT has got some serious problems. every morning when
i first start it up, it starts and then dies immeadiatly. then when it starts running i have to hold the rpms way up(approx 2500-2700). Then the choke will stay on all the time and the check engine light stays on. Also im getting terrible fuel mileage, its down to 64 kms for half a tank of gas, and im doing normal city driving and not racing around at all. any help would be great, thanks |
Replies:
Posted By: Romeo
Date Posted: 03 June 2010 at 11:30pm
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Alright brother, this is a job for le scan tool. PS, there's no choke on a fuel injected vehicle, the ECM just runs open-loop for the first minute or so. ------------- Never shift into reverse without a back-up plan. |
Posted By: Patrick
Date Posted: 04 June 2010 at 12:23am
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Got a paper clip? http://www.fiero.nl/cgi-bin/main.cgi?ECMCodes - ECM Codes . |
mxracer208 wrote:Posted By: Capt Fiero
Date Posted: 04 June 2010 at 7:48am
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Sounds like your IAC is acting up, or you have a leaking
injector causing the engine to flood on fire up and the IAC can't deal with it. If you can make it over here, today, Friday or make it to the meet tomorrow, I can bring the club scan tool and we can see whats going on. 64kms on 1/2 tank of gas, the engine must be pouring fuel in, either from a bad injector, busted vacuum line to the fuel pressure regulator or bad O2 sensor. Everything can be sorted out with a scan tool. However sounds like no matter what the problem is, you will need to buy some parts. As a test, get the car out onto the freeway and run it up to 120kph, and see if the fuel mileage improves. I'll almost bet money that at a highway cruise your gas mileage goes back to normal. Its just in town stop and go traffic that you are burning a lot of fuel. If the O2 sensor is shot, you can almost meter fuel by the hour rather than by the miles. When my O2 sensors on my V8 were bad, I would get 2hrs of run time on a full tank, didn't matter if that 2hrs was in traffic and only went 10kms or if I was FOOT TO THE FLOOR doing 200kph it got the same amount of fuel burned. ------------- Capt Fiero 88 Fiero GT 5spd V6 Eight Fifty Seven GT V8 5spd. |
Posted By: beken
Date Posted: 04 June 2010 at 1:59pm
If you have a bad injector, I would be very careful driving the car. That's one way of getting an engine fire and we wouldn't want to exasperate that myth of a reputation Fieros have.
 -------------  Beken (aka Ken) - bekentech@westcoastfieros.com Original and still the owner of an 85SE 2M6 4spd |
Posted By: mxracer208
Date Posted: 04 June 2010 at 11:38pm
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thanks for the help, and yes im going to need to get a scan
of it because something is still really wrong with the idle, and so much more |
Posted By: Romeo
Date Posted: 05 June 2010 at 10:49pm
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Could be the TPS Sensor. I hear those are causing idle issues, right Doc? ------------- Never shift into reverse without a back-up plan. |
Posted By: mxracer208
Date Posted: 06 June 2010 at 2:51pm
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could be, and some how, the car fixed itself cause the idle
has dropped atleast 700 rpm to a tolerable level, not perfect but much better |