RE: [DML] Warm Up Gone Wild
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

RE: [DML] Warm Up Gone Wild

  A "jumping" RPM is "normal" for this engine set-up in the Delorean. After it warms up-IF there are no other factors- the RPM's should pretty much settle down to ~750.  After I had my fuel system overhauled, I noticed my RPM would start out "normal", then slowly creep up to a 1500 RPM idle. I thought it might be the mixture screws. When I drove to Snowmass, CO for the Delorean Convention several years ago, the RPM's acted "normal" there. Interesting. Returning home (Tulsa), they slid back up to 1500 at idle.  After ~18 yrs of this I finally checked the back of the engine & found one of the 3 vacuum lines disconnected. Aha! Reconnected the middle hose and VOILA! idle is back to 7-800 RPM.  Who'da thunk?   I feel so much better now!      Drive Stainless    Robert   VIN  6924   
> To: dmcnews@xxxxxxxxxxxxxxx
> From: dmcvegas@xxxxxxxxx
> Date: Tue, 20 Apr 2010 17:44:36 +0000
> Subject: Re: [DML] Warm Up Gone Wild
> Once the car warms up, is the idle steady? Any work done in the engine compartment at all right before this happened?
> Could be a few different things. Vacuum leaks can play havoc like this as the fuel mixture tries to enrich and lean itself, and the Idle Speed Circuit starts fighting to maintain a specific idle and the unmetered air enters in and itself can cause the idle to increase. But more information is needed.
> -Robert
> vin 6585 "X"
> --- In dmcnews@xxxxxxxxxxxxxxx, Mike French <mdfrenchij@...> wrote:
> >
> > In the interest of keeping a close watch on the car, I've noticed that
> > the warm up has started to go wild. It used to warm up steadily between
> > 750 and 1000rpms. Then settled at just under 1000 after two or three
> > minutes. Now, it cold starts and begins idling wild, dipping into 500rpms and jumping
> > up close to 1500 while warming up. This also happens on a warm start
> > and the only way to get the car to settle down to normal steady idle is to press the
> > accelerator and run it for a few seconds. I always maintain a full
> > charge on the battery and the car is always garaged. Want to deal with
> > this before it gets worse. The car has 5,500 miles on it. I replaced the alternator at 4,000 miles with a D110 due to a bad Motorola original. The alternator has not given me any issues. Any help is appreciated.
> > 
> > Thanks,
> > Mike
> > #6239
> > 
> > 


To address comments privately to the moderating team, please address:

For more info on the list, tech articles, cars for sale see

To search the archives or view files, log in at! Groups Links

<*> To visit your group on the web, go to:

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    (Yahoo! ID required)

<*> To change settings via email:

<*> To unsubscribe from this group, send an email to:

<*> Your use of Yahoo! Groups is subject to:

Home Back to the Home of PROJECT VIXEN

Copyright 2006  All rights reserved.

Opinions expressed in posts reflect the views of their respective authors.
DMCForum Mailing List Archive  DMCNews Mailing List Archive  DMC-UK Mailing List Archive