I just swapped chevy 03 5.3 flex for 05 gmc 5.3 flex . I only used the 05 block and heads . everything else stayed from the 03 . It is misfiring even after new plugs and wires , I am sure all connections are good . any ideas what my problem could be ?

5

Asked by Sep 20, 2007 at 09:01 PM

Question type: Maintenance & Repair

6 Answers

2,875

Was it running OK before the swap? Maybe the crank sensor got damaged during the swap. BTW, why did you need to swap an '03 already?

5

driving through unfamiliar area and ran through some water and sucked it up in intake subsequently threw rod .

5,175

I'm liking the crank shaft position sensor on this one. When you say misfiring, do you meant one cylinder in particular, or the timing is just plain off in general?

5

multiple cylinder misfiring predominatly 31 & #&

5

performed a crankshaft relearn , was successful . Still the only code im getting is multiple cyl. misfire .

5

#1 & # 7

Your Answer

Add photo

Related Questions

Chevrolet

Looking for a Used Chevrolet in your area?

CarGurus has 783,256 nationwide Chevrolet listings starting at $500.

ZIP:

Search Chevrolet Questions

Chevrolet Experts

#1 Tom Demyan
Tom Demyan
Reputation 22,440
#2 Rowefast
Rowefast
Reputation 16,190
#3 John Saffrahn
John Saffrahn
Reputation 15,780
View All

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.