stupid check engine light

[RFMustangGT]

alrighty, after getting my ranny flushed and refilled I've got a wierd problem. I think it was already starting to brew for a while but when my car is in park the check egine light will flash a few times and then go off. after it goes off the idle on teh car jumps and stays at 1500rpm and sometimes up to 2000rpm. I can pat the gas some and usually after a pat or two it will settle down. well, sometimes it comes back. I thought might be a vacume leak or it's getting really mad at the 160* stat I need to change. Any other ideas? Thanks ahead of time.

 

[HISSIN50]

What is the code(s)?

Good luck.

 

[Mig233]

Correct me if i'm wrong but the '94 and '95 stangs are OBD1. My scanner at home only reads OBD2. I know there is a way to "jump" the ecu, but i don't want to fry anything. Some one has to know how it's done.

 

[RFMustangGT]

I have a matco reader. it worked fine a while ago but it won't pull coeds now and another guy that worked on my stangcouldn't get the car to pull codes either. could my chip be preventing it to pull codes? either way, my idel in park is making me mad. I've now got it to where if it does it a good 3,000rpm rev will clear everything out and it will idel fine with the every now and then surge.

 

[RFMustangGT]

Correct me if i'm wrong but the '94 and '95 stangs are OBD1. My scanner at home only reads OBD2. I know there is a way to "jump" the ecu, but i don't want to fry anything. Some one has to know how it's done.

94-95 is EEC-IV

 

[HISSIN50]

Correct me if i'm wrong but the '94 and '95 stangs are OBD1. My scanner at home only reads OBD2. I know there is a way to "jump" the ecu, but i don't want to fry anything. Some one has to know how it's done.

94-95 V6's are OBD-II and 94-95 GT's are OBD-I.

 

[bill302]

where are ya'll attempting to pull codes in engine bay or under dash.

 

[RFMustangGT]

engine bay.

 

[bill302]

could be bad tester click on link and attempt to pull codes with a light tester. and post results. good luck.

http://www.muscularmustangs.com/test1.php

 

[bill302]

if you can't retrieve any codes using the light tester you may have to test the pvc,iac,tps,maf,iat and cos2 sensors with a digital multimeter to determine where your problem is.you can purchase a mustang repair manual or check one out at library the manual will show you how to test sensors and how to determine if there bad so you will know what to reset, replace and clean you will find this info in the emissions section. when you attempt to retrieve codes do you get any codes because in any case you should recieve a 111 code which is system pass do you even get this code. also click on link below and read there is some good info. you may have already seen check out solving idle problems 1-5.

http://www.muscularmustangs.com/maintain.php

 

[95WhiteVenom]

the plug to check the codes with a code reader is in the engine bay on the passenger side on the back side of the fenderwell facing the firewall. Little black box help in with a plactic clip. Pull the top off and plug in the code reader. I got mine from mid-way auto supply also selective walmarts have them too.

 

[RFMustangGT]

the plug to check the codes with a code reader is in the engine bay on the passenger side on the back side of the fenderwell facing the firewall. Little black box help in with a plactic clip. Pull the top off and plug in the code reader. I got mine from mid-way auto supply also selective walmarts have them too.

thats the plug I've been using. today teh car doesn't seem to be doing the idel hang as long. might be fixing itself. I'm thinking something got fouled up when I had the tranny flushed. after I get out of class and eat lunch, I'm going to disconnect the bat for an hour of so to see if that wll clear it out of the system.

 

[HISSIN50]

thats the plug I've been using. today teh car doesn't seem to be doing the idel hang as long. might be fixing itself. I'm thinking something got fouled up when I had the tranny flushed. after I get out of class and eat lunch, I'm going to disconnect the bat for an hour of so to see if that wll clear it out of the system.

If time is of the essence, you can disco' the battery and put your foot on the brake pedal for 5 seconds. The KAM should now be cleared (hitting the brakes creates a draw to discharge the capacitors in the computer. You could turn on the headlights, etc instead.).

Good luck.