Guest Soupy074 Posted September 21, 2009 Share Posted September 21, 2009 I just registered for this forum. I'm sure my problem has been discussed before, but here goes. Within a couple minutes after startup and idling, the enging starts sagging and shortly shuts down. After that it usually runs o.k. the rest of the day, but once in awhile it sags at a stop sign. No codes are set. I've checked the fuel pressure and it holds around 42psi. The displayed TPS stays steady, but the IAC goes wild and goes up to over 150. I understand at idle it should be around 38. A few weeks ago I replaced the IAC with a used one. No difference. The resistance of the two IAC windings are around 50 ohms, which is normal according to the manual. Any suggestions? Link to comment Share on other sites More sharing options...
Jim Posted September 21, 2009 Share Posted September 21, 2009 My wife's car was similar. Thanks to Daves89 I looked at the MAF and found two O rings under there. Obviously from one time I had been using her car to test parts. Anyway, the two O rings wasn't the problem but I put on a different MAF and the car runs much better almost prefect. I am going to look at the IAC next. Link to comment Share on other sites More sharing options...
padgett Posted September 22, 2009 Share Posted September 22, 2009 Classic stuck IAC. May have replaced but did you clean out the passage with solvent ? Might be gunk in the manifold. Link to comment Share on other sites More sharing options...
D-a-n-i-e-l Posted September 22, 2009 Share Posted September 22, 2009 Last time O2 was replaced? Link to comment Share on other sites More sharing options...
Guest Soupy074 Posted September 22, 2009 Share Posted September 22, 2009 I haven't changed the Oxygen Sensor in years, but the indications on the computer shows that it is cylcling on and off and is within the range stated in the manual. It's a cheap try. I'll pick one up next time I'm in town. Thanks Link to comment Share on other sites More sharing options...
wws944 Posted September 22, 2009 Share Posted September 22, 2009 One other thing you might want to check for is a leaky vacuum hose.In the 3 weeks that I have had our Reatta the S-shaped hose with the 90° bend in it, that runs into the downstream side of the MAF, has popped off 5 or 6 times. When this happens, unmetered air gets into the system and the computer gets very confused. It becomes hard to start - especially when warm, and the idle is weird. So I finally bought a little 3/8" quick-disconnect hose clamp for it to solve the problem. Link to comment Share on other sites More sharing options...
Guest ekvh Posted September 23, 2009 Share Posted September 23, 2009 I second what wws944 reports. Mine did the same. New hose stays on now Link to comment Share on other sites More sharing options...
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