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 High idle... how to set tps and iac 
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Joined: Sat Sep 22, 2018 2:12 pm
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Post High idle... how to set tps and iac
Need to find procedure for setting tps and iac. My 37 efi gtr xd will start cold at around 800 rpms, but when it warms up it idles at 1400-1600 rpms in neutral. If I am running the boat and come all the way off the throttle it will stay at around 2000 rpms or more. It may come down to 1600 or 1700 after a few minutes but maybe not. I have high idled in neutral and when I come down back off the throttle i have seen it not want to come down below 3000 rpms. In gear and high idle will not act this way when I first shift, only after I have revved up and then am coming back to idle. This is a center console rig with mercury throttle. Engine is all stock with about 25 hrs.

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18x48 custom hull. 37 efi gtrxd. Stock 3 blade. 29-31 mph load dependant.


Sun Oct 14, 2018 6:47 pm
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Location: Gladewater TX
Post Re: High idle... how to set tps and iac
Disconnect the cable and see how it acts. I can tell u how to set it but it's not making sense


Sun Oct 14, 2018 8:44 pm
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Location: Gladewater TX
Post Re: High idle... how to set tps and iac
Also could be a sticking iac, wiring or I've even seen an ecu with a bad iac driver


Sun Oct 14, 2018 8:46 pm
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Joined: Sat Sep 22, 2018 2:12 pm
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Post Re: High idle... how to set tps and iac
Do you mean to disconnect the iac or the tps? I called delta this morning. They seemed to think it was the tps either needing to be set or faulty. Depending on how it acts when I disconnect the cables this afternoon will determine where I go from here.

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18x48 custom hull. 37 efi gtrxd. Stock 3 blade. 29-31 mph load dependant.


Mon Oct 15, 2018 9:21 am
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Post Re: High idle... how to set tps and iac
Forgot to add it is throwing a 0336 code. Found this by cycling key on/off three times.

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18x48 custom hull. 37 efi gtrxd. Stock 3 blade. 29-31 mph load dependant.


Mon Oct 15, 2018 9:31 am
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Location: Gladewater TX
Post Re: High idle... how to set tps and iac
I was referring to disconnecting the throttle cable to ensure issue is in engine itself. The code you have is common but not likely causing high idle. Are you under warranty?


Mon Oct 15, 2018 5:03 pm
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Post Re: High idle... how to set tps and iac
I am under warranty. I took it to delta and it did in fact end up being the throttle cable. Man I felt like a retard. Thanks for the help Will.

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18x48 custom hull. 37 efi gtrxd. Stock 3 blade. 29-31 mph load dependant.


Tue Oct 16, 2018 4:20 am
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Joined: Wed Jan 14, 2009 7:23 am
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Location: Tarkington, TX
Post Re: High idle... how to set tps and iac
That Will C... He's a Smart feller..

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Tue Oct 16, 2018 5:05 am
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Post Re: High idle... how to set tps and iac
A happy ending, lol


Tue Oct 16, 2018 6:53 am
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Joined: Fri Dec 18, 2009 8:10 pm
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Location: Rowlett, TX
Post Re: High idle... how to set tps and iac
A fart smeller, indeed!


Tue Oct 16, 2018 4:36 pm
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Post Re: High idle... how to set tps and iac

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Bayou Surface Drive
337-351-0362
Tarkington, TX 77327


Wed Oct 17, 2018 6:36 am
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Post Re: High idle... how to set tps and iac
Y'all just crazy ;)


Wed Oct 17, 2018 6:53 am
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Post Re: High idle... how to set tps and iac
Lol

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Wed Oct 17, 2018 8:21 am
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