88 Cobra Wont Idle

[88 cobra1975]

Hello everyone..I have 88 fox body with cobra 5.0 in it..Put new dist,coil pack,an ecm..She ran great,few days ago had her out it started raining,she back fired,an ever since that day,stang wont idle seems like she over loading,if im in the gas she runs fine,soon as I let off gas it stalls...PLEASE HELP ME!!!Trouble shooting without code reader is expensive!!

 

[Mustang5L5]

Trouble shooting without code reader is expensive!!

Code readers are cheap

Amazon product ASIN B000EW0KHWView: https://www.amazon.com/INNOVA-3145-Ford-Digital-Reader/dp/B000EW0KHW



Was your 88 MAF converted? What are th specs on the motor? Do you know the actual parts installed? Not doubting your claim to a "Cobra motor" but I've seen more cars posted on here that have a Cobra engine than actual cobras made.

 

[General karthief]

This will show you how to pull codes:
https://www.stangnet.com/mustang-fo...codes-from-eec4-in-86-95-5-0-mustangs.889006/
May not give you much as far as your problem gos, here is another place with some info on how to diagnose your problem.
jrichker and others put this together, just follow the directions.
http://forums.stangnet.com/787471-cranks-ok-but-no-start-checklist-fuel-injected-mustangs.html

 

[88 cobra1975]

Code readers are cheap

Amazon product ASIN B000EW0KHWView: https://www.amazon.com/INNOVA-3145-Ford-Digital-Reader/dp/B000EW0KHW



Was your 88 MAF converted? What are th specs on the motor? Do you know the actual parts installed? Not doubting your claim to a "Cobra motor" but I've seen more cars posted on here that have a Cobra engine than actual cobras made.

yes was converted,dont know the specs of motor,just know cobra stamped all over it,if i could fig out how would post pic..

 

[88 cobra1975]

bought a code reader but it seems like its not connecting wit ecu,this car got me all over the place,was tinkin around other day unplugged tps an it seems to run ok,just idleing kinds high,,scratchin my head..

 

[Mustang5L5]

Try this link so see if you missed something trying to run the codes

 

[vristang]

How was the engine swap done? cobra ecu, maf, injectors? Is there a chip in the ecu?
Is the egr system intact?

 

[88 cobra1975]

i got 88 fox body,At idle it wants to stumble,smells like fuel seems like its running rich,if I run it hard seems fine,but it back fires in between shifts..New parts,ecm,dist,ign module,coil,temp sensor,iac,map sensor..Smog stuff elimated,no maf..Pulled codes an got..10,11,67,81,82,85..In need of advice PLEASE..

 

[jrichker]

You guys with idle/stall problems could save a lot of time chasing your tails if you would go through the Surging Idle Checklist. Over 50 different people contributed information to it. The first two posts have all the fixes, and steps through the how to find and fix your idle problems without spending a lot of time and money. It includes how to dump the computer codes quickly and simply as one of the first steps. I continue to update it as more people post fixes or ask questions. You can post questions to that sticky and have your name and idle problem recognized. The guys with original problems and fixes get their posts added to the main fix.

It's free, I don't get anything for the use of it except knowing I helped a fellow Mustang enthusiast with his car. At last check, it had more than 250,000 hits, which indicates it does help fix idle problems quickly and inexpensively.

 

[88 cobra1975]

not sure how engine swap was done,injectors 19lb no chip in ecm,just new fac ecm,no egr system not intact

 

[88 cobra1975]

thank u,ill try..