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

83,255

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.

217,175

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.

83,255

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 42,479 nationwide Mustang listings starting at $1,699.

ZIP:

Search Ford Mustang Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Ford Mustang Experts

#1 Tom Demyan
Tom Demyan
Reputation 3,980
#2 FordNut
FordNut
Reputation 1,230
#3 COMETGUY61
COMETGUY61
Reputation 990
View All

Related Models For Sale

Used Chevrolet Camaro
437 Great Deals out of 40,552 listings starting at $3,500
Used Dodge Charger
477 Great Deals out of 30,024 listings starting at $2,275
Used Chevrolet Corvette
282 Great Deals out of 20,456 listings starting at $3,688
Used Ford F-150
3,010 Great Deals out of 207,475 listings starting at $1,200
Used BMW 3 Series
1,449 Great Deals out of 38,302 listings starting at $1,495
Used Jeep Wrangler
517 Great Deals out of 18,235 listings starting at $2,900
Used Honda Accord
966 Great Deals out of 74,563 listings starting at $899

Used Cars For Sale

2014 Ford Mustang GT Convertible For Sale
59 listings starting at $21,945
2013 Ford Mustang GT Convertible For Sale
50 listings starting at $17,642