Question about 1990 Chevrolet Astro Extended

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1990 Astro Van V6 2wd Z vin. The van was running fine then starting running bad. Basically when I do the morning start to allow it to warm up it starts hard or idles hard at first like it not getting enough gas or only half started, with a lot of shaking and hesitation. Like an old train when it starts up. You give it gas and it shakes faster for a bit til it clear out and levels off smoother. Has like a slow whoa whoa whoa whoa to a faster whoa whoa and smooths out. I notice my 90 Ponitac transport with a v6 does the same thing but I don't drive it much. Anyway I changed the fuel pump, wire harness, fuel filter, distributor cap and rotor cap and cleaned the egr. Ran better for a few minutes. Turned it off for the night and the next morning the same thing again. After it warms up it better but still has some hesitation in travel and will sometime die when I come to a stop. I think I have covered most of it. Any help would be greatly appreciated. Thanks

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  • sheeptender Jan 19, 2011

    Well it got worse through the day so I stopped to get some oem plugs and wires before changing the fuel regulator. Man the plugs on the drivers side are a ****** bear to get to but I got it done and she fired right up and runs like a champ, smooth and clean with 189K. I had also cleaned the injectors off with carb spray and may have fouled the plugs making the condition worse. Don't know that but is just a thought. The check engine light had come on that day it got so bad but I didn't have a readre. So I just took the cable loose, changed the plus and wires and reconnected the cable and now she runs great and the light has not been back on. Thanks.

  • sheeptender Jan 20, 2011

    Will the Intake cleaner foul the plugs or do I keep it from going in down the throttle body inside the engine?
    Thanks

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What condition is the spark plugs in? Where the ignition wires replaced? This seems to be associated with one or both. Is there a check engine light on or trouble codes stored in the PCM?
How many miles are on the vehicle?

Posted on Jan 02, 2011

  • GetMeOttaHere Jan 19, 2011

    You should be good for 60,000 miles with oem plugs. I know plug removal will test anyone's patience, especially in an Astro Van. Glad to hear you worked it out. If you get a chance, spray out the throttle body with INTAKE CLEANER. This will clean up the small air passages that become dirty overt time. Thanks for the update.

  • GetMeOttaHere Jan 20, 2011

    No, the intake cleaner will not foul the plugs, but when you spray the cleaner into the throttle body, with the air intake removed, manuall operate the throttle when spraying.

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