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Username Post: Fuel pump issues        (Topic#366429)
gchemist 
Member #271 Senior Chevytalk Moderator
Posts: 25563
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
09-17-21 12:35 PM - Post#2827268    

Well, BADBOW's fuel pump has failed. The GM ZZ4 ignition module tested good. I swapped it out anyway. I'll keep it as a spare with dielectric grease handy. What brand of fuel pumps are ya'll running? In 20 plus years, it's the second to fail. The first one was an original 305 stock pump. The current one is OEM style too. I'm going to replace the steel line fuel filter and pump. The current one is a three line type. The carb can only take so much fuel pressure. So an OEM style pressure will work fine.

'83 Silverardo XST - ZZ4 powered
'95 Jimmy SLT (Bought @131,814)
'96 GMC Jimmy LS Ret. @236651 miles
'08 GMC Acadia 3.6L SLE


 
Liberty Valance 
Contributor
Posts: 134
Liberty Valance
Loc: Euless,Texas
Reg: 07-21-14
09-20-21 04:13 PM - Post#2827518    
    In response to gchemist

If you still have mechanical pump, I stick with AC Delco. I have 2 gone bad in 6 years. One was aftermarket, the last one was an AC Delco. Went back with Delco. Even though the AC Delco went bad, I still believe they are better than any aftermarket. Just my 2 cents.

1974 Cheyenne 10 LWB STOCK 350 W/HEI /TH350 /AC/ 4 BBL Quadrajet
Mopar by Birth
Chevy by Choice


 
gchemist 
Member #271 Senior Chevytalk Moderator
Posts: 25563
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
09-21-21 02:50 AM - Post#2827583    
    In response to Liberty Valance

Thanks. After some more troubleshooting, BADBOW has no spark. I replaced the ignition module without a real check. I didn't have someone to help crank it while I checked. Now that I know, I bought a new coil. I'll install it later this week. The fuel pump should be good. However, I should get a new one. The current one is like 15 years old. Not high mileage, just old and slightly abused.

'83 Silverardo XST - ZZ4 powered
'95 Jimmy SLT (Bought @131,814)
'96 GMC Jimmy LS Ret. @236651 miles
'08 GMC Acadia 3.6L SLE


 
Mad Professor 
Contributor
Posts: 138

Reg: 12-30-08
09-30-21 07:16 PM - Post#2828328    
    In response to gchemist

Glad you found problem.

Concerning mechanical fuel pump, not on my C10 but on my 68 camaro I used a Carter.

This is about equivalent current version.

Carter M4891



62 Willys wagon
67 CJ5 Buick V6 w/OD
68 Camaro RS/SS , 69 LT1 350, M22
73 C10 292 6, M21 muncie/hurst, 3:73 posi
85 C10 305, SM465
89 S10 baja package







 
xstuntman 
Contributor
Posts: 109

Loc: west Texas
Reg: 04-13-09
10-01-21 04:37 AM - Post#2828335    
    In response to Mad Professor

Replaced one on my 4wd and it was a PITA. You thought about going electric? Being able to mount it on the firewall is appealing to me.



 
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