High idle with xf throttle body

niss720 · Post by **niss720** » Wed Jun 05, 2013 7:13 pm

I have recently done a mpi conversion on my jb
It has a xf throttle body, 560cc injectors and its running a stinger 3 ecu.

Anyway it's been tuned and the tuner got the idle as low as he could but it,still sits at 1300rpm, does anyone know how to get it lower? IM guessing its to do with the throttle body

popup · Post by **popup** » Wed Jun 05, 2013 9:26 pm

What controls the idle? Idle motor or valve?

How much gap have you got on the throttle butterfly, you must be getting air into the engine somehow. Perhaps a leak?

OLD FART · Post by **OLD FART** » Thu Jun 06, 2013 6:39 am

Does it have a Falcon ISC fitted ??

niss720 · Post by **niss720** » Fri Jun 07, 2013 6:36 pm

I don't think it has any of the ISC stuff, it just came with the manifold I got off of Mitsumadness. Is the ISC stuff seperate from the throttle body?

Starion VR4 · Post by **Starion VR4** » Fri Jun 07, 2013 7:09 pm

Put a pic up of it.. makes it easier

ProZac · Post by **ProZac** » Sat Jun 08, 2013 3:39 pm

Did they pressure test the inlet system? A leak after the throttlebody will cause it to idle high.

niss720 · Post by **niss720** » Sun Jun 09, 2013 6:43 pm

Nah it hasnt been pressure tested and I will try get some pictures up tomorrow or so!

Adriano · Post by **Adriano** » Sun Jun 09, 2013 7:08 pm

If there is a leak bad enough to idle at 1300, then you willl be able to hear it, either that , or there is a big flat blade screw n the throttle body to adjust base idle, and small throttle stop screw with a locknut. Also check for endfloat in the throttle shaft

Ps xf throttle bodies are rubbish

Austarion

High idle with xf throttle body

High idle with xf throttle body

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