newdiamond

it is idling below 500, so pretty rough still. Would the thermostat also cause this? i apologize for my ignorance, this is my 1st attempt to diagnose this stuff myself rather than taking it to the shop...

mzmtg

iTrader: (11)

Refer to your Haynes manual for the procedure for setting the idle speed.

newdiamond

i just got this Max, I am bidding on a manual on Ebay right now, is there a website that gives guidance on how to set the idle speed?

guido32

Don't know about the idle speed, but I replaced my ECTS a couple months ago. My CEL was on and my max stalled sometimes. I didn't have an idle problem before during or after. Did you reset the ecu? Also, you may want to do a tune up(ngk coppers or platinums, air filter, fuel filter). First, I would try reseting the ecu. Its free, and takes less than 5 minutes.

f550maranello2

iTrader: (2)

adjust ur idel: disconnect the tps sesor and look at ur tach if its stick it should be around 550 if auto 650 +-50rpm
by the way make sure u have the ac off as well as everything else , the just turn the IACV screw

PedalKick

My 95's idle was getting worse over time. At first it would drop low at a stop then recover after about 1 second. After a while it would stall sometimes. I thought the problem might be due to the IACV (idle air control valve) so I took it apart. The valve works like a small stepping motor that turns a threaded plunger closer or further away from a small air passage that bypasses the throttle plate. When mine was apart, the armature piece that turns has a small ball bearing on each end. One bearing is hard to see as it only comes out of it's housing a little bit but enough to see. When I turned mine by hand, it made a squeeky, dry bearing kind of noise. I spray lubed it until there was no more noise, then reassembled. Now it idles great. Worth a try.

newdiamond

been driving for 2 days now with no problems!