Need help 4.3L wont start after R&R intake
#11
SPAM HUNTER
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I would say injector issue...(poppets) injectors are aweful. Not the same engine, but we had a 98 van with a 305 (yes i am sure it was a 305) It had a similar coolant leak issue. When we got it all together it was missing bad. After testing everything possible and loosing our *** on the intake job, we used a spare injector assembly just for ***** (again we had already lost out ***) and VROOM. Also if all else fails. I have a 05 4.3 with 51K out of my silverado ill sale you with all accessories and harness .
Best of luck figuring this out.
Dustin
Best of luck figuring this out.
Dustin
#12
A wasted weekend, and $360.00 later it finally runs. I installed a new spider assembly from Napa, and it fired right up The Napa spider is a much better design than the original, it does away with the shitty poppet style injectors. Looks like it might impead airflow a bit but this pos has no power anyway. Thanks everyone for your help, and ideas. I should have doubted GM's shitty engineering over my own work in the first place.
#14
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Youve got a newer GM Multec 2 MPFI spider. It replaces the older CSFI poppet spider.
The newer S10's and 4.3's got the newer MPFI Multec 2 spider. They flow the same 19 pph(at 43.5psi) as the CSFI poppets do.
GM was replacing the poppet spiders in Vortec 305/350's in California with a V8 MULTEC 2 spider assembly for free at 1 time.
peace
Hog
The newer S10's and 4.3's got the newer MPFI Multec 2 spider. They flow the same 19 pph(at 43.5psi) as the CSFI poppets do.
GM was replacing the poppet spiders in Vortec 305/350's in California with a V8 MULTEC 2 spider assembly for free at 1 time.
peace
Hog
#15
Youve got a newer GM Multec 2 MPFI spider. It replaces the older CSFI poppet spider.
The newer S10's and 4.3's got the newer MPFI Multec 2 spider. They flow the same 19 pph(at 43.5psi) as the CSFI poppets do.
GM was replacing the poppet spiders in Vortec 305/350's in California with a V8 MULTEC 2 spider assembly for free at 1 time.
peace
Hog
The newer S10's and 4.3's got the newer MPFI Multec 2 spider. They flow the same 19 pph(at 43.5psi) as the CSFI poppets do.
GM was replacing the poppet spiders in Vortec 305/350's in California with a V8 MULTEC 2 spider assembly for free at 1 time.
peace
Hog
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