HIGH IDLE ON 2.5 ENGINE

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HIGH IDLE ON 2.5 ENGINE

Postby TomChrysler » Sat Apr 19, 2008 5:46 am

GOOD EVENING!

MY 1986 TOWN AND COUNTRY SEEMS TO STAY AT HIGH IDLE ALWAYS. THIS IS GREAT WHEN COLD, BUT IT IS PUTTING A DENT IN MY MILEAGE WHEN WARM. WHEN I DO THE COMPUTER CHECK, NO ERROR CODES FLASH. ONLY THE ALL CLEAR (55). IS THERE A COMMON FIX? CHRYSLER HAS REPLACED THE TPS SENSOR, AND SEVERAL VACUUM HOSES. HMMMMM...WHAT COULD IT BE?

THANKS IN ADVANCE,

TOM
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Car Information: 1986 Chrysler Town and Country

Re: HIGH IDLE ON 2.5 ENGINE

Postby terrymirkov » Sat Apr 19, 2008 11:22 pm

May be a vacuume leak on the intake. Have a carbed 84 that has a plastic float bowl. Heat melted it and sucked it in. My mechanic fixxed it but said it is common on this vehical.
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Re: HIGH IDLE ON 2.5 ENGINE

Postby TomChrysler » Sun Apr 20, 2008 2:11 am

Thanks Terry!

I'll check it out and let you know. I really appreciate your response.

Giving you my best,

Tom
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Posts: 90
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Location: Sacramento, California
Car Information: 1986 Chrysler Town and Country

Re: HIGH IDLE ON 2.5 ENGINE

Postby guyd_15 » Mon Mar 23, 2009 12:10 am

I'd suspect a vacuum leak. I've had high idles over 2500 rpm with a major vacuum leak (line to brake booster leaking)!

Use an unlit propane torch and hold it near the vacuum lines and fittings, when the leak sucks the propane the idle should speed up.

Hope this helps,

Guy
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Re: HIGH IDLE ON 2.5 ENGINE

Postby LebaronVert86 » Thu Mar 26, 2009 5:52 pm

Many times these high RPM condition could be related to a wiring issue. To troubleshoot a drivability issue the FSM says to first pull codes and then check all wiring, connectors and condition as well as all vacuum hoses, connectors and condition. From there a proper course of action can be taken.
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