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Vans & Minivans GMC Safari & Chevy Astro GMC Safari/Chevy Astro
1889 messages, Last post on Nov 13, 2009 at 9:04 AM
You are in the GMC Safari & Chevy Astro Forum. Your Host is Karens
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95 Astro. Ran fine but set for about 5 mo. Had to buy new battery, While jump starting gauges, lights went crazy. Would not start afterwards. Fuel pump replaced, fuel drained. new filter. Tune up new plugs (Bosch P4) took those out rep. with AC OEM. New fuel filter , Bosch wires, Dist cap/rotor. OBD1 giving some odd readings from evap canister system. Replaced ECM/EPROM. Fuel pressure at 55-60. Car starts fast idle a little rough, rep. MAP sensor. Problem only occurs when it reaches operating temp. Temp gauge working so sending unit is OK. Pulled out EGR. no sig carbon pin worked smoothly. I'm running out of Ideas, The nice man at the Dealer said bring it in for $110/HR and we will help you. LOL. I do have a good mechanic  $40/HR. Honest! but he is stumped also. Seem like some sensor is cutting the fuel once it is warm and the TPS is opened. Could it be the TPS? But the OBD did not show a problem with it. I hate to just start replacing sensors. O2 sensors seem to be sensing and switching well within voltage range. Any ideas would be appreciated.
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Replying to: csparrazza (Jan 10, 2009 6:33 pm) |
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Replying to: csparrazza (Jan 10, 2009 6:33 pm) My 1998 AWD Astro did the same thing AFTER the fuel pump was replaced by a shop. I went berserk trying to find the problem. Stalling, towing to shop, etc. Here is the test ... Fill the van FULL of gas to the top. Drive it around. I guaranty you don't stall or sputter unitil you get under half a tank or less of fuel. Try this and let me know. My problem was the non-GM (aftermarket) pumps that you get from everywhere but the dealer, have a pickup (Not to be confused with the screen on the bottom), but an actual hose with a metal quarter sized round pickup that snaps into the channel where the screen is. Mine came loose and hovered half way up inside the pump body. When the van had less than a full tank especially on hills and turns it would sputter and stall because the quarter size pickup was sucking air instead of fuel. This literally drove me crazy for 8 months until I got disgusted and dropped the tank myself and took out the old pump and found the problem. I bought a new GM Pump and no more problems. You can reseat the pickup in the bottom of the pump but I don't guaranty it will stay seated.. Good Luck and let me know. My van runs great no problems at all NOW !!! Joe
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Replying to: csparrazza (Jan 10, 2009 6:33 pm) DLM1 |
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Thank you for your replies so far I will look into some of your Ideas. I did end up getting an OBD code of 32 which is the EGR Valve. I have checked the ground and reference voltages to the valve they are fine, so I am going to replace the EGR valve. Got a good deal On Ebay new Delphi for $70. Waiting for it to arrive this week. Hopefully this will do it. I have also wondered about the Autozone fuel pump if it is working properly but the pressures are good. I will post the results for those interested. Craig S
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| I drive my GMC safari,but the gear shift display in the cluster keeps moving to something else eg if I 'm in park it display mabe 3 ,whenI'm in drive it display P then sometimes move to D,when u're N it shows P and so on,everything else on the cluster works fine any idea if it's a problem with some sensor or is it the cluster or ? | |
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My current symptom is the van will start, rough idle, I can rev it some, but about 7 seconds later it will dive/stall. I need to know what the fuel pressure is at the back side of the TBI. I also wonder if the EGR passages can be blocked temporarily to see if the EGR is dumping hot gas in the intake at the wrong time? I've replaced the plugs, wires, cap, rotor, coil, IAC valve, computer, coolant sensor, cat. I've had the ignition control module tested, the EGR tested. The dealer replaced the fuel pump, but I wonder if it was done right. I replaced the injector pod with a rebuilt one. Aside from low fuel pressure or EGR malfunction, the only thing I can dream up as a possible cause is hot gas leaking through to the intake passages at the intake gasket. I've run a complete set of pressure tests and leak down tests to rule out the head gasket or burnt valves. |
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Will the body parts from a 1988 Safari Van fit on to a 1987 Astro Van? Our 1988 was hit and we purchased it back from the insurance company. We purchased a 1987 Astro Van and would like to know if the body parts are interchangeable. Rosemary
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| everytime I shift from park to D or any other position the shift position display on the cluster will show something else eg if I move to R the display shows P ,if I move to N it shows 3 when I'm in D it shows R etc everything else on the cluster works fine any idea if it's a sensor or module or the actual cluster? | |
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Replying to: Clydesrose (Jan 31, 2009 4:27 am) DLM1 |
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