my 1988 mustang gt convertible usually runs great but sometimes it idles up and down and will even die. the problem stops when i accelerate but will continue at cruising speed. sometimes it does not happen for days, then when it happens it can last for a few seconds up to a day. i have replaced the cap, rotor, plugs, wires, fuel filter and egr valve. it feels like a vacuum issue, but i do not think a vacuum issue would come and go like this. i am lost! please help

Asked by Mar 11, 2015 at 06:28 AM about the 1988 Ford Mustang GT Convertible

Question type: Maintenance & Repair

my 1988 mustang gt convertible usually runs great but sometimes it idles up and down
and will even die. the problem stops when i accelerate but will continue at cruising
speed. sometimes it does not happen for days, then when it happens it can last for a
few seconds up to a day. i have replaced the cap, rotor, plugs, wires, fuel filter and egr
valve. it feels like a vacuum issue, but i do not think a vacuum issue would come and
go like this. i am lost! please help

4 Answers

92,605

Does the check engine light come on when this is happening? It could be a bad sensor or ECM ground. Sometimes the wiggle test can locate the trouble if it is a wiring or grounding issue.

15

I conquer with tennisshoes, also consider checking on the condition of your engine mountings please.

237,015

I'd clean the throttle body and IAC valve. Like tennisshoes says, pull the code or codes, maybe the TPS is suspect. BTW: the '88 doesn't have a check engine light hooked up to the ECM, wasn't till the '89 models.

92,605

Your right Tom, i just assumed it was a air density car. I forgot that 88 was the only year Ford didn't t use a check engine light.

Your Answer

Add photo

Related Questions

Mustang

Looking for a Used Mustang in your area?

CarGurus has 45,658 nationwide Mustang listings starting at $1,999.

ZIP:

Search Ford Mustang Questions

Ford Mustang Experts

#1 Tom Demyan
Tom Demyan
Reputation 4,270
#2 Bob Beaman
Bob Beaman
Reputation 1,210
#3 COMETGUY61
COMETGUY61
Reputation 1,060
View All

Related Models For Sale

Used Chevrolet Camaro
211 Great Deals out of 30,758 listings starting at $1,217
Used Dodge Charger
402 Great Deals out of 28,079 listings starting at $1,988
Used Chevrolet Corvette
117 Great Deals out of 20,536 listings starting at $3,000
Used Ford F-150
2,190 Great Deals out of 205,430 listings starting at $1,499
Used BMW 3 Series
988 Great Deals out of 31,761 listings starting at $1,000
Used Jeep Wrangler
274 Great Deals out of 18,085 listings starting at $2,950
Used Honda Civic
657 Great Deals out of 89,873 listings starting at $1,299
Used BMW M3
43 Great Deals out of 1,537 listings starting at $5,800

Used Cars For Sale

2014 Ford Mustang GT Convertible For Sale
69 listings starting at $20,500

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.