94 GMC sierra starts and runs fine till it warms up then backfires shuts off and will not start again until it cools off and repeat??? I asked same question but about a 97 was told it was mass airflow

50

Asked by May 08, 2015 at 07:50 PM about the 1994 GMC Sierra 1500

Question type: Maintenance & Repair

12 Answers

95

Check vacuum lines leading from tbi to egr.. check egr operation and clean MAF.

95

Also, check the vac. line running to the maf as well. should come from the back side of the tbi to the maf.

65,565

Check the distributor control module,sound,s like it is getting hot and shutting truck off.

50

Already replaced DCM, ecm, fuel pump,fuelpump relay, coil

2 of 2 people found this helpful.
50

And computer has been replaced

1 of 1 people found this helpful.
65,565

Cataltic conveter replaced?

65,565

Or Crank sensor?

50

Catalitic converter isn't clogged and there isn't a crank shaft sensor on this truck so I've been told...is there one and if so where's it located

1 of 1 people found this helpful.
65,565

I reread that you replaced the ECM,check the igniton switch.

50

OK I will check ignition switch first thing in the morning... Thanks so much T_S_T...and I will keep you posted

1 of 1 people found this helpful.
50

When you say ignition switch you are referring to the actual key switch or is there something else called ignition

65,565

Yes,the key cylinder,good luck

Your Answer

Add photo

Related Questions

Sierra 1500

Looking for a Used Sierra 1500 in your area?

CarGurus has 69,110 nationwide Sierra 1500 listings starting at $1,850.

ZIP:

Search GMC Sierra 1500 Questions

GMC Sierra 1500 Experts

#1 dragonflyoffshore
dragonflyoffshore
Reputation 5,090
#2 John Saffrahn
John Saffrahn
Reputation 3,560
#3 Glenn Clingenpeel
Glenn Clingenpeel
Reputation 3,220
View All

Related Models For Sale

Used Ford F-150
2,068 Great Deals out of 207,301 listings starting at $1,499
Used Dodge Ram 1500
411 Great Deals out of 10,835 listings starting at $1,400
Used Toyota Tacoma
472 Great Deals out of 41,615 listings starting at $1,995
Used GMC Yukon
379 Great Deals out of 19,293 listings starting at $2,000
Used Chevrolet Tahoe
556 Great Deals out of 31,361 listings starting at $1,500
Used Chevrolet Camaro
244 Great Deals out of 31,183 listings starting at $369

Used Cars For Sale

2017 GMC Sierra 1500 For Sale
51 Great Deals out of 45,367 listings starting at $23,408
2016 GMC Sierra 1500 For Sale
88 Great Deals out of 3,573 listings starting at $17,671
2015 GMC Sierra 1500 For Sale
107 Great Deals out of 4,043 listings starting at $14,999
2014 GMC Sierra 1500 For Sale
101 Great Deals out of 4,286 listings starting at $14,495
2013 GMC Sierra 1500 For Sale
46 Great Deals out of 1,925 listings starting at $10,950

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.