Question about 1999 Chevrolet Blazer

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I Have a 2002 blazer that starts but motor dies, surges when accelerating

I Have a 1999 blazer that starts but motor dies right away. Problem on 2002 4.3 chevy blazer. Recently had fuel pump replaced. One month later the truck surges under hard acceleration above 2500 rpm. Normal acceleration is fine. Hard to start. Checked fuel pressure and within standards. Dsitr, cap, rotor, plugs, wires and fuel filter replaced. No codes. Any ideas....

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  • htmusser May 31, 2009

    Thanks fuzzysocks, you were correct. I went out and spent the money to purchase the conversion kit. Cleared all my problems. Installation was no big deal other than time. I really appreciate your input.....

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  • Master
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If this engine is a VORTEC then you may have a problem with the internal fuel system. Under the top plenum there is a fuel reg and poppet valves that inject fuel into the cylinders. Sometimes the tubes that run fuel from the reg to the valves can leak and cause your problem. This cannot be found with pressure check because this occurrs after the reg. PS fuel mileage will go down. Let me know if this helps.Moe

Posted on May 26, 2009

  • Moe Jul 18, 2009

    You are very welcome

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There are to many things that will cause this problem, it sounds like a bad MAP sensor but you say you have no DTC codes. The only thing i can think of is to do a GM Dive Cycle Test. If your not sure what that is here is a link and I hope this will help you solve your Blazer's problem with out the guess work since you have no DTC codes.
Good luck and keep me posted. http://myweb.accessus.net/~090/dtcobd2n.html

Posted on May 26, 2009

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  • Contributor
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Check the amps under starting, and the timing, they are very sensitive to the timing, and has to be within a degree of factory

Posted on May 26, 2009

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Feb 02, 2011 | 1997 Buick LeSabre

1 Answer

1999 buick lesabre engine surges a d sometimes dies when accelarating only when in gear not while idling in park


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The solution is to replace the fuel pump/clean out or replace the fuel filter of your buick.


Have a nice day!!

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1 Answer

I Have a 1999 blazer that starts but motor dies right away.


Check the fuel delivery, first. It could be fuel pump or an obstruction. The best way is to start the car in park, then run over to the engine compartment and rev up the throttle. Keep idle higher than normal. If it wants to die, rev throttle higher to compensate. If it makes no difference, verify fuel pressure when engine dies. Usually ignition related wont even allow the car to start. Any service engine indication?

Mar 02, 2009 | 1999 Chevrolet Blazer

1 Answer

2000 chevy blazer starting issues


swng,
1) Is the service engine soon light ever on when engine is running?
2) Per your description I would look at the ECT sending unit. It sends coolant temperature information the the Engine Control Module for proper fuel delivery for cold engine start. It may have lost its calibration.
Let me know.
Regards,

Feb 24, 2009 | 2001 Chevrolet Blazer

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