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Chevy Venture Starting/Stalling/Idle Issues

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  • srulizsruliz Posts: 7
    Thanks for responding.
    Is it a simple task to clean on my own?
    Would you be able to send me a picture or descibe to me the throttle body location?
  • azuazu Posts: 84
    Just take off the rubber air duct and spray some throttle cleaner and use a soft cloth to wipe off the plate. There is not much room but it can be done. Some will say to take the complete assembly off, but I was able to clean it enough and corrected the problem so I didn't go that route.
  • srulizsruliz Posts: 7
    Thanks a million. I'll try tomorrow and let you know.
  • srulizsruliz Posts: 7
    ok. I opened the hose and the throttle body and flap were relatively clean, however I did spray it out and wipe it down and my engine still races on idle when I start the engine and randomly while driving and parking. Any other ideas? I changed the Idle Air Control Valve and checked the continuity of the wiring from the IAC Valve to the PCM (computer) and its fine.
  • robfred1robfred1 Posts: 5
    Usually a surging or high idle problem is a loss of vaccuum. or to much air entering the system through the throttle body. Mine was actually caused from the throttle body gasket. It had deteriorated over time, and started sucking in air from the back of the throttle body.
  • azuazu Posts: 84
    3 things come to mind. Vacuum leak somewhere, bad TPS and/or bad MAF sensor. Have you had it scanned for any codes?
  • srulizsruliz Posts: 7
    My mechanic did a scan and didn't get any codes, however I will take it on Monday for another more intense scan.
    Funny thing though is that it only races when the engine is fully warm and races really bad when i put it into reverse and back into drive 2 or 3 times when parking on a warm engine.
  • srulizsruliz Posts: 7
    just did another scan for codes and what i get is an error for the idle air sensor which was the first thing i replaced with a delco brand. one mechanic claims its the pcm computer and the other claims that the idle sensor might not be siting right and wants to reset it. any idea?
  • tjh87tjh87 Posts: 4
    edited July 2011
    Back around January I was driving our Venture (right after a snow storm, clear and cold) and it said the coolant was hot, gauge was as far as it cold go to the right. Nothing noticeable that shown any overheating, nor did any noise go off, although I don't know if this happens when the car overheats. A few months back after the car drove about 30-40 miles, and was turned off for a few, it would start then stop, and it sounded like it was idling low and misfiring. Tried a few times, gave it a rest, and about 15 minutes later, it ran fine. Nothing happened for the rest of the night about another 40-50 miles. My father said it happened a few weeks later.

    Recently the heat gauge has been going from about half way between the middle and Hot to the middle and Cold (middle being the vertical line in the center for clarification) in a matter of second, and seemed a bit unreliable. Now on Saturday it reached H with the hot coolant in the display and no noise about 4-5 times, usually while it was stopped (same drive as the one before when it start and stall), started up fine after we reached our destination (car said hot coolant both on the gauge and the display, car was off for about 5 minutes), and was fine the rest of the day, about another 80 miles. Now again today, driving home, it reached H and all, and after I got home, I tried starting it, and it would start and stop. 15 minutes later and some gas, ran fine except for a little vibrating which happens all the time. When it started and stopped, it sounded like it was trying to hold idle, then it would drop, reach idle again, drop in idle, and then it would either stall, or reach idle, drop idle, then stall. We believe it could be the computer, but no real clue. Another idea would be the engine protection that kicks in when the engine overheats, but that doesn't happen while driving (car felt like it always does). Any ideas?

    Also, when the car overheats, does it make a sound or an alarm (I hear none although the display says engine coolant hot and gauge says the same)? Or is the display and the gauge tied together, and the display is not triggered by the comp but the gauge?
  • srulizsruliz Posts: 7
    OK. We finaly solved the problem for my Chevy Venture engine racing. We removed the throttle body to make sure that the gasket was not leaking and to make sure the idle sensor was sitting right. What we discovered was that the TPS (Throttle Postioning Sensor) needed to be replaced. We replaced the gasket and TPS and the car runs fine.
    Thanks to all of you for your input.
  • wdf73wdf73 Posts: 2
    I have a 2002 Venture. A month or so ago, it died while my wife was using it. After a lot of messing around, I discovered the plug that goes through the floor behind the driver's seat was bad. I replaced it, and all went well for a while. Then it died again, (Thankfully in the yard this time). Both times the fuel pump was not kicking on. I went through all the connectors, tried hot wiring the fuel pump, and finally dropped the tank. When I unplugged the wiring connector from the pump, I noticed some corrosion, so I cleaned it up and everything seemed to work. Now I have had fail to start twice. Both times it runs well until it is shut off (both times on a hot day), then will not start. One time a friend was helping me and removed the tubing from the fuel pressure regulator and the pump started working, and the next time I disconnected the plug from the bottom of the van and hot wired the pump to test it. It started up and then worked fine when I hooked the plug back up.
    If I understand the wiring diagram right, it appears that if the fuel pump relay closes, it provides power directly to the pump. Do I have a pump that is going bad and has a 'dead spot' in it, or could the relay be going bad?
    Thanks for the help!
  • So sorry for the late late reply. Had to change the water pump anyway so I took apart other stuff to get to the camshaft position sensor. But for the life of me, just couldn't easily remove the power steering pump without disconnecting hoses.. Did not want to disconnect the p.s. hoses for a relatively minor problem. No codes are ever set. It just takes a second start sometimes if the engine has been off between 10 - 60 minutes. Strange that before and after that range it starts fine. Thankfully the starter is relatively new so it can take a beating and still keep cranking!
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  • I have a 2003 Chevy Venture. Recently it started stalling on me. I changed the fuel filter, and air filter. I got codes that led me to change the coil packs and module. When I went to start it up gas shot out of the fuel pressure regulator. I replaced it. Now I have no codes, and when it starts it will Idle for a minute or 2 and then stall. If I try to give it gas it begins to shake and stutter. I have no Idea what it could be since there are no codes. As far as I can tell I am not getting any vacuum leaks anywhere. All of the wiring seems good and connectors are good, and tight. I also replaced the plugs and wires. It is still having the same problems. Does anyone have any ideas of what the problem could be? Any advice would be extremely helpful. Thanks.
  • tjh87tjh87 Posts: 4
    Hi, Thought I'd bring this here. My parents have a 2000 Chevy Venture with over 130k, that I also drive. Over the summer, an interesting starting issue began, and it doesn't happen very often. What happens is the car will start, idle very rough, then stall. It has happened after sitting 5 minutes, after sitting for 40, and it has happened after a 40 mile drive, and a 1-2 foot drive (literally). I believe its something in the fuel system (but I am not sure), and a lucky well timed slap of the gas gets the car to a normal idle, as well. Has anyone else had this issue?
  • Did you ever figure this issue out ? I have been having the same issue with my 2000 Chevy Venture (with the coolant light) and earlier today it died at a stop sign and now wont stay running...

    I replaced my fuel pump , filter and relay about 3,000 miles ago and can hear the pump click on... So im hoping that really isnt the issue again.
  • hoov2hoov2 Posts: 1
    I am dealing with the same issue. At first I thought it was an injector leaking down after shutoff but after further review, I discovered anti-freeze (very small amounts) in cylinder #1. There is a good chance it is a head gasket. This might sound a little crazy but when you first start it up stand at the back of the vehicle and smell the exhaust. If it is bruning anti-freeze it will have a sweet smell to it. You will not notice any loss in anti-freeze initially since the small leak will take time to notice and when you shut the vehicle off after running for some time the vehicle goes through "heatsoak". It actually heats up more, creates presure and as it cools it creates a vacuum which is how it pulls additional fluid from the resevoir tank. Problem is that if there is a small trace leak, this vacuum will never be created. You may want to have a mechanic you trust look at it before the engine gets damaged from the leak. Good luck.
  • I have just started having the same problem with my 2000 venture it also happens when i will be driving and the start to stutter some times it stalls I just had my fuel pump replaced and as soon as I left the mechanics it did it again. Did you have any luck finding out what it could be?
  • k9will2k9will2 Posts: 15
    my 2001 venture 3.4 after you drive it and then park for a few minutes it cranks and extra few cranks before it starts i have been told that it could be injector leak down causing a little flooding of cylinder, but it all ways starts, after it sit for along while it starts normally, it only does it after you run it and than shut it off for a short time and than try to start it, fuel pump has been replaced because gas gauge was acting up.
  • I had this exact problem on my 1997 Chevy Venture. Stalling, no codes, no other apparent problems. I solved the problem by replacing the Camshaft Position Sensor. The sensor is located on the passenger side of the engine near the top. You have to remove a lot of stuff to get to this simple sensor, but it worked. Now I have no more stalling, failing to start or other related anomalies.

    I also changed the Crankshaft Position Sensor just because . . .
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