Apex hard to start and won't idle NEED HELP

andre162

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• Oct 17, 2009

• #1

My 2006 Apex with a MPI Stage 1 is giving me problems starting and idling. I did a blead down test and everything looks good. I sent the controler to get checked out and it also checked out good. Is their anything else that i should be testing before i take it to the dealer? Any sensers that could be bad and cause this problem? Any help would be much appreciated!!!!!!!!!!

 

RX-1MT

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• Oct 17, 2009

• #2

Have you checked your plugs?

 

RACINSTATION

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• Oct 17, 2009

• #3

Something to check: I have seen the charger belts be too loose and have drag that wont allow the sled to idle. The other option is to unplug your GEMS controller and plug the stock harness back in and try that. If it starts and idles with the stock configuration, you know it is the GEMS. If it is the controller, it could be set up wrong on the idle circuit or be an internal problem.

The other item I have found is spark plugs. If all else fails, check the plugs. Put some CR10EKs in there and make sure to warm it up good every time you start it.

 

andre162

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• Oct 17, 2009

• #4

I have tried unhooking the GEMS and it still had the same problem. I wil check the plugs and the blower belt and report back.. Thanks for the help You got to love having the forums for helping with problems like this!!!!!!!!!!!

 

heinracing

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• Oct 17, 2009

• #5

checked throttle position?

any error codes?

 

andre162

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• Oct 18, 2009

• #6

what do you mean by throttle position?

 

Turblue

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• Oct 18, 2009

• #7

vacuum hose off? Pressure test the system

 

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JohnBoyTurbo

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• Oct 18, 2009

• #8

The Throttle position sensor. Mine did the same thing at the start of last season. Good luck.:face-icon-small-hap

 

J

johnny be bad

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• Oct 18, 2009

• #9

What codes flash?

 

andre162

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• Oct 18, 2009

• #10

I havent seen any codes flash. the sled will start if you give it a little throttle but then you have to stay on the throttle to keep it running. I removed that inercooler so no boost is getting to the motor and it seemed to help but not fix the problem. I pulled the plugs and they didnt look perfect so i am going to pick a set up Mon and put them in. It seems that it is a sensor problem but i am not sure. If that trottle position sensor is bad will it put out a code? thanks for all your help!!!!!!!

 

Sammy

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• Oct 18, 2009

• #11

Turblue said:

vacuum hose off? Pressure test the system

Click to expand...

X2 on this. Sounds like a vacuum leak to me. Any active code will be displayed on your guage group.

 

andre162

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• Oct 18, 2009

• #12

This may be a stupid question but what would be that best way to test the vacum system?

 

Sammy

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• Oct 18, 2009

• #13

fairly easy to do. You will need to find a rubber or plastic boot that fits over the compessor inlet of your supercharger (air filter inlet) and install a schraeder valve in that boot. Schraeder valves can be found at any tire shop.Connect an air compressor to the schraeder valve just as you would to fill a tire.Be carefull not to over pressurize the system. I have a pressure regulator and guage on my system to regulate psi to around 20 lbs. The whole idea here is to pressurize your intake system and then go around a listen and check for air leaks. Soapy water will find the smallest of leaks. Simply check at all locations on the intake where there is a hose connection and at your throttle body connections as well as the intercooler. Once again be very careful with the amount of pressure as you could damage the intercooler and yourself. Just a note,air will constantly bleed past the butterflies in your throttle bodies so don't mistake this for a leak.

Hope this helps

 

Sammy

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• Oct 18, 2009

• #14

Here http://www.snowest.com/forum/showthread.php?t=162905&highlight=boost+leakis a link that probably explains better on how to check for boost leaks.

 

andre162

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• Oct 21, 2009

• #15

Installed a new TPS, and Problem solved!!!!!!!!!!!!!!!!! Thanks for all your help guys.....:beer;