Hello to any mechanic that works on 4.3 liter vortec engines this is a question for you ; what would cause a couple cylinders to spit out masses of gasoline into the spark plug chambers?

Asked by May 04, 2015 at 08:41 PM about the 1996 GMC Jimmy 4 Dr SLE SUV

Question type: Maintenance & Repair

I want to know how to narrow down
exactly what it is wheather its the
spider or the ecm? ? Any simple fests
that I can run to find sulutions to my
problem would be well appreciated .

2 Answers


Fuel pressure regulator,or as you said,spider vein is bad,the bad is,no way to test the spider,but check the regulator by checking the fuel pressure,if pressure is good,then more than likely the spider.


Just replace the Spider assembly. It comes with a replacement regulator. Usually the leaky regulator makes the middle 2 cylinders run super rich

Your Answer

Add photo

Related Questions

Search GMC Jimmy Questions

GMC Jimmy Experts

#1 Andrew Olsen
Andrew Olsen
Reputation 280
#2 tennisshoes
Reputation 270
#3 1oldman
Reputation 240
View All

Related Models For Sale

Used Chevrolet Blazer
1,175 listings starting at $1,495
Used GMC Sierra 1500
791 Great Deals out of 68,235 listings starting at $1,800
Used Toyota 4Runner
227 Great Deals out of 19,339 listings starting at $2,300
Used Chevrolet S-10
8 Great Deals out of 1,349 listings starting at $1,899
Used Chevrolet Tahoe
599 Great Deals out of 33,203 listings starting at $1,375
Used GMC Yukon
439 Great Deals out of 20,484 listings starting at $1,495
Used Jeep Wrangler
282 Great Deals out of 15,777 listings starting at $3,795
Used GMC Sonoma
6 Great Deals out of 425 listings starting at $1,988
Used Ford Bronco
188 listings
Used Toyota Tacoma
562 Great Deals out of 42,404 listings starting at $1,995

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.