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2004 Pacifica will not go past 2500 rpm. If you spray either while keeping throttle at 2500 the engine dies instead of revving up. ????

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  • Cars & Trucks Master
  • 9,742 Answers

Have a diagnostics run on the car. That will yell you which sensor or other parts are misbehaving.

Posted on Nov 17, 2014

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6 Suggested Answers

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Posted on Jan 02, 2017

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SOURCE: 2004 chevy trailblazer idles fine normally but on

Full engine tune up , with fuel injection cleaning.

Posted on Jan 23, 2010

  • 86 Answers

SOURCE: won't start, engine wont rev above 2000rpm

Have the alternator tested. You are providing a low charge to the battery when you jump it and when taking it above 2K RPM requires more amperage resulting in the engine dying and the rough idle

Posted on Apr 23, 2009

Molson02536
  • 3854 Answers

SOURCE: 2004 Chevy Silverado HD 2500

On many engines with distributor less ignition systems and sequential fuel injection, a camshaft position sensor is used to keep the engine's control module informed about the relative position of the crankshaft. By monitoring cam position (which allows the control module to determine when the intake and exhaust valves are opening and closing), the control module can use the cam position sensor's input along with that from the crankshaft position sensor to determine which cylinder in the engine's firing sequence is approaching top dead center. This information is then used by the engine control module to synchronize the pulsing of sequential fuel injectors so they match the firing order of the engine. On some applications, input from the camshaft position sensor is also required for ignition timing.
The camshaft position sensor may be magnetic or Hall effect, and mounted on the timing cover over the camshaft gear, on the end of the cylinder head in an overhead cam application, or in a special housing that replaces the distributor (in the case of some of the GM applications). Operation and diagnosis is essentially the same as that for a crankshaft position sensor.  

Re  check the wire harness and the sensor installation to the camshaft sensor in Bank #1 which is where the #1 cylinder is. Good luck and hope this adds some light to you question, keep me posted and be glad to help.

Posted on Jun 02, 2009

  • 13 Answers

SOURCE: high idel

You may have a bad control valve or regulator. Did you adjust the idle properly?

1. Disconnect the connector on top
2. Adjust idle to around 650-700k rpm
3. Reconnect the electrical connection

After reconnecting, the idle should jump up around 700-750k rpm.
The idle screw is fail safe setting in case the ecu cannot set the idle. The rpm's set by the idle screw are supposed to be below the ecu/stock idle.

If this doesn't work, you may have a dirty or bad Idle Air Adjuster and/or Air Regulator. For information on cleaning that, you can refer to this page http://s95014253.onlinehome.us/63104/157335.html

You can test the IAA by supplying power to the plug with the car off. Listen for any clicks or humming. That will signify that it still may be working but is possibly stuck. The Air Regulator is for high idle for warming up your car. It has a bi-metal spring inside that rotates a disc closing off an airway to bring idle to normal after a couple minutes. If it dies it will stay open and give you permanent high idle. If it gets clogged usually no high idle for warm up.
You can remove it and peer through the end. If you see a thin sliver of light, it's open. Connect 12 volts + & -, wait a few minutes and see if it's now closed. If not, it's likely dead. It can be opened and cleaned if that's the issue.

Posted on Jun 27, 2009

  • 462 Answers

SOURCE: 2004 GMC 2500, 6lt. V8. Reduced Engine Power Keeps

Have the codes checked first and go from there.

Posted on Oct 10, 2009

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My 2001 dodge 2500 5.9 gas engine wont stay running you have to keep giving it throotle


Having to keep the throttle plat open could be 2 things (just to start). one, the air filter is clogged(like really dirty). The other is the idle air control motor is dirty or not working. Clean the throttle body and idle air control motor with brake clean. Use a toothbrush and clean inside as best as you can. It will take a second or two to start. Then spray the brake clean in the throttle at higher RPM's.

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2004 chrysler pacifica struggles to get to 40 mph and engine has loud whistle when over 1500 rpm


Is the check engine light on, and have you checked the computer for trouble codes ?
Is there a large vac leak on the hose between the throttle body and the air cleaner, or the intake?
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99 saturn loud revving sound in engine


Start the car and use a spray bottle to spray a bunch of water mist around the top back of the engine where the intake meets the head. If it starts to die you have an intake manifold leak. It\'s kind of a pain to change, but not really technical. Also, clean your throttle body and clean the idle air controller (IAC). Alos consider replacing the Throttle position sensor (TPS). Both are located on the back of the throttle body.

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On cold start up engine revs up to 1500 rpm then down to 500rpm and keeps doing this until it warms up also sometime conks out when revving up and down


a number of possible solutions, including a vacuum leak (check hoses, use a spray throttle body cleaner o9n the intakie manifold looking for leaks), or the Idle air controller is dirty or defective, or the throttle position sensor is bad. Do you have a check engine light?

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93 chevy suburban v-8 tbi hard to start, but starts, will run but will not idle, can keep it running or driving as long as you rev engine constantly. Holding engine at half throttle it will slow and die. ...


Assuming your engine is in good mechanical condition, there are only a few options.

1. You may have a vacuum leak.
2. The pickup in the distributor may be worn to the point that it is sloppy at idle but normal at higher rpm.
3. Idle control valve/motor may not be working properly.

It probably isn't an ignition related problem as the problem would normally get worse as RPM increases. I've seen #2 about 5 times in the past year or 2 so it's not uncommon and would recommend replacing the entire distributor if you come to that conclusion, but would definitely check all vacuum hoses first.

Jun 24, 2011 | 1993 Chevrolet Suburban

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When starting, engine will rev up to 3000 rpm then will die. but you can keep it running if you keep it revved up above 3000 rpm


Things to look for: Could be your intake manifold gasket, throttle position sensor, vacuum hoses, throttle body gasket, idle screw, fuel pump, fuel filter, fuel pressure regulator, or maybe you have a split in your gas tank or fuel line(s) that is messing with your fuel pressure. See if you smell gas back near the driver's side rear wheel.

Good luck, those are things I would search for, I can't promise anything, could be a number of things. You should have a check engine light on.

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