Results 1 to 11 of 11
Thread: 350 Vortec trouble starting.
-
05-17-2010 #1
Registered User
- Join Date
- Jun 2004
- Location
- Tacompton
- Posts
- 750
350 Vortec trouble starting.
I have a 350 Vortec engine in my 1999 GMC Sierra 2500 Classic and it has recently started having trouble starting. It is usually not on the first start of the day but, after you shut it down for a little while. It won't start on the first crank, usually on the second and then it idles very weak for two or three seconds. After that it idles fine and smooth right at 600 rpm. I have tried running fuel injector cleaner and that doesn't help. I also replaced the fuel pump and filter recently. Do you think it needs new injectors and if so how hard is it to do? Thanks and any help is appreciated as it is my daily driver.
1968 Chevelle 408 BBC,200 4r trans.
1987 Buick Grand National all original
1966 Chevy II Coupe 383 TCI Suspension
1969 C10 Custom FS/SB Daily
-
05-17-2010 #2
Starting The Transformation
- Join Date
- Sep 2008
- Location
- Kathleen, GA
- Posts
- 159
maybe fuel pressure regulator..i'm bettin it's the pump
05-17-2010 #3
Registered User
- Join Date
- Nov 2004
- Location
- Colorado
- Posts
- 1,260
cam sensor?
05-17-2010 #4
Registered User
- Join Date
- Sep 2006
- Location
- Southern Indiana
- Posts
- 4,709
I would almost bet the fuel spider has sticking poppet valves if its CPI, I have access to local AC Delco dealer and they go for around 399.
Lee Abel
AFTERMARKET PERFORMANCE
1977 Chevy Monza 2+2:Project "Cheap Trick"
1978 C10 Long bed , On air and trailer puller
2006 Buell Blast ,Just a bike to ride and for mileage
1966 Caprice 4dr Sports Roof fact.327/now 350/SOON 454???? Project "II Old,,,ZERO BUDGET OR LESS CAPRICE!"
05-18-2010 #5
Starting The Transformation
- Join Date
- Sep 2008
- Location
- Kathleen, GA
- Posts
- 159
clear your PM's socal
05-18-2010 #6
Registered User
- Join Date
- Jan 2005
- Location
- Burleson Tx
- Posts
- 268
I would recheck fuel pressure. See if the pressure bleeds down after you shut engine off. fuel pressure regulators do leak on these. They can be bought aftermarket,very easy to change, under plenum mounted on side of injector assy. If its not leaking down, fuel pressure must be 55 lbs or will have problems starting. have seen these engines have 50 lbs and have starting issues.
Kenny
05-19-2010 #7
Registered User
- Join Date
- Mar 2009
- Location
- Wake Forest,NC
- Posts
- 843
I'm betting the fuel pump, I had the exact same problem 6 mos. ago with my Tahoe. New pump cured it.
05-19-2010 #8
Registered User
- Join Date
- Jun 2004
- Location
- Tacompton
- Posts
- 750
Fuel Pump
When you had the problem with your fuel pump could you still hear it running? I have had the fuel pump replaced in the past and it has lifetime warranty parts and labor so it may be time to go visit the dealership.
1968 Chevelle 408 BBC,200 4r trans.
1987 Buick Grand National all original
1966 Chevy II Coupe 383 TCI Suspension
1969 C10 Custom FS/SB Daily
05-20-2010 #9
Registered User
- Join Date
- Mar 2009
- Location
- Wake Forest,NC
- Posts
- 843
Yep,only had the problem if it sat for a few days. If I gave it a shot of ether it would fire up. If I drove it everyday it was fine. Seemed like it would lose it's prime then was a pita to get started.
05-20-2010 #10
Registered User
- Join Date
- Jun 2004
- Location
- Tacompton
- Posts
- 750
Thanks for all the help. I will let you know what it is after I do some more trouble shooting this weekend.
1968 Chevelle 408 BBC,200 4r trans.
1987 Buick Grand National all original
1966 Chevy II Coupe 383 TCI Suspension
1969 C10 Custom FS/SB Daily
05-23-2010 #11
Registered User
- Join Date
- Oct 2007
- Location
- ridgefield ct
- Posts
- 876
it may simply be the check ball in the sending unit/fuel pump. put a pressure gauge on over night and see how long it takes to bleed down.
work in progress--for the next 10 years.
1987 monte carlo ss 383ci, 9.7:1, xe274 cam, vortec heads, 200r4, 3.73 posi.
Reply With Quote
