My 98 chevy blazer misfires when cold until the engines warm. changed the plugs, wires, cap, button, crank sensor, cam sensor, mass air flow sensor, fuel filter, air filter, and spark exciter.
Don't know if you got your answer. I found my Timing gear/chain set worn very badly. Cam bouncing. Causing the distributor to misfire between 2000 to 3000 rpm. You can check your play by pulling the distributor cap. Then bar the crank damper back and forth. The rotor button should rotate at exactly the same time the serpentine belt moves. Best way to do this, is to have somebody bar the engine while you put one hand on the rotor and your other hand on the A/C pulley. Rotor and pulley should start to move together. Check by rotating the other way.There will be play only if you reverse directions. If so, pull the timing chain cover and check the gears. Hope this helps.
What about the temperature sensor which is the one according to message given to ECU get the correct quantity of fuel ?
SOURCE: 98 Astro Van,when warm hesitating, stalling
WELL YOU CHANGED ALMOST EVERY THING EXCEPT IGNITION CONTROL MODULE........
SOURCE: My chevy express van 1500 cranks but wont start
test and see if you have spark and fuel preasure, you may have bad feul pump, common problem is the fuel pump goes bad, but check before replacing.
SOURCE: van sputters whenever you go to take off from a
hi there, i had the same problem with my 98 astro van, and took it to the shop, the computer pumped out a mass airflow sensor, they replaced it at considerable cost lol, but the van now runs good
SOURCE: 97 chevy cargo van 5.7liter engine. Replaced fuel
try to spray some carburetor cleaner inside where the air goes in the engine...it will clean the system and it might start...
press some gas when you try to start the vehicle...
good luck!
SOURCE: 1992 chevy blazer 4.3 vortec engine 2w dr have
Check the wireing to the pump they had problems with it it tended to over heat and corroad there is a service bulliton on the prroblem #25215705and a kit with new wires and connector to resist over heating Icould give you the kit # but i got a DELPHI pump and the connector dosn;t fit a chevy pump
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