runninr rich and high idle
Printed From: West Coast Fieros
Category: General Fiero Chat
Forum Name: General Talk about Fieros
Forum Description: Just want to chat about fieros? here's the place to make that happen.
URL: http://www.westcoastfieros.com/forum/forum_posts.asp?TID=2046
Printed Date: 24 November 2024 at 5:33am
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Topic: runninr rich and high idle
Posted By: tk_85redgt
Subject: runninr rich and high idle
Date Posted: 29 August 2010 at 7:09pm
| the i bot the car from changed the ecm and the idle is a little high and run rich has any 1 had this problem could it be a wrong ecm or just the wrong 1 for this car? |
Replies:
Posted By: Capt Fiero
Date Posted: 29 August 2010 at 8:55pm
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You need to fill in a few blanks before you are going to get a correct reply. How high is the idle, it should be about 1000rpms once warmed up or about 1200-1500 on cold fire up. Most Fiero's will idle high when the ECM is changed out sometimes for up to 15 mins of driving until the ECM resets the IAC. IAC = Idle Air Control Valve. As to the running rich thing, all Fiero's run rich when cold due to the single wire non heated O2 sensor, however again once warmed up they should not run that rich, if you are getting a rich condition first thing to check is the O2 sensor if you don't know when it was changed last change it. Same goes for the spark plugs, dist cap and rotor. Plugs should be NGK UR5's. Cap and Rotor get the MSD cap and rotor set. http://www.captfiero.com/ppc - www.captfiero.com/ppc has many of the common part numbers and listings.
Where are you located and do you have access to a scan tool. The club has a scan tool that can be used at club meetings, events or under special conditions you can bring the car to my place and I can scan it here. We do not loan out the scanner. I am in North East Surrey. You can also pm Dr.Fiero as he does Fiero repairs in North Delta / South West Surrey near Scott Road. OBD 1 scan tools can be bought on Ebay now for under $100 and will save you a ton of time and money. Don't buy a code reader they are damn near useless and you can do the same thing as code reader does with a paper clip by jumping the pins on the ALDL connector. ------------- Capt Fiero 88 Fiero GT 5spd V6 Eight Fifty Seven GT V8 5spd. |
Posted By: tk_85redgt
Date Posted: 30 August 2010 at 5:42pm
| we live in surrey bird land,148 and 108 ave.the ecm has been in the car for some time and we bot it in north van,drove it home and still does the same thing.drove it on sunday to white rock for the swap meet and back home still does the same thing.i can't drive it don't have my drives lin yet so my dad drives it and we are going to fix every thing,by the time i get my drivers i hope.thanks hope to me u some day.tino.call us at 604-585-3121 u can talk to my dad dean. |
Posted By: Capt Fiero
Date Posted: 30 August 2010 at 7:22pm
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Well I am in Fraser Heights 104th Ave and 169th St. I've got a Fiero coming in at 7:30 tonight to do some work on so I am going to busy outside, however I'll try to give ya a call sometime this week. If you can get the car over here, we can run the numbers on the ECM and check the Chip in the ECM to make sure it all is correct. If you have an aftermarket chip in the ECM take it out and toss it in the garbage. That is probably half your running rich issue. ------------- Capt Fiero 88 Fiero GT 5spd V6 Eight Fifty Seven GT V8 5spd. |
Posted By: tk_85redgt
Date Posted: 30 August 2010 at 7:35pm
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my dad stop at dueck on marine and talk to 1 of his buddes.he gave him the ecm #1226869 and the prom # FTY 9355 they matched so it must be something else.we have obd scan tool but it wont work on this car,newer cars only.the car has no insurance but we can get a permit if need to.thanks |
Posted By: Roadfury
Date Posted: 01 September 2010 at 10:23am
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Hey capt, FYI this was my old car.
Tk, the ECM was temporarily swapped out when I was trying to get it to run but i can insure you that unless you swapped it, it has the stock 85 gt manual trans ECM in it now. Look into vacuum leaks or failed sensors, capt set the timing so it shouldn't be that. ------------- 
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Posted By: tk_85redgt
Date Posted: 01 September 2010 at 6:29pm
| the guy we bot it from he said he swapped the ecm.we checked the code and it is the right 1.we looked today for vac leaks didn't find any.we ran the car yesterday and drove it from the front driveway to the back and the check engine light came on.we ran it today came on again.we pulled the gauge cluster out to change burnt out lights,when we put the cluster back and started the car the check engine light never came on funny ha. |
Posted By: Capt Fiero
Date Posted: 01 September 2010 at 10:22pm
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If this is Roadfury's car, I would start with the O2 sensor
and go from there. ------------- Capt Fiero 88 Fiero GT 5spd V6 Eight Fifty Seven GT V8 5spd. |
Posted By: tk_85redgt
Date Posted: 02 September 2010 at 3:41pm
| changed the 02 sensor and it fixed the high rpm but know when its the car gets hot the rpm jump around 800 to 1000 rpm.going to clean the idle air control and see what happens there.didn't find any vac leaks. |
Posted By: Patrick
Date Posted: 02 September 2010 at 4:04pm
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If you have A/C, just make sure it's not simply the A/C cycling on and off (which it also does in Defrost mode). I'm serious.
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tk_85redgt wrote:Posted By: tk_85redgt
Date Posted: 02 September 2010 at 9:55pm
| no A/C.my dad has the day off and we're going to hit a some auto wreckers |