 Engine idle raise drop, cold… DJet help., up/down/up/down.... |
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| broomhandle |
 Oct 27 2011, 11:03 AM
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#1
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Member  Group: Members Posts: 290 Joined: 26-June 09 From: Half Moon Bay, CA Member No.: 10,512 Region Association: Northern California  |
Engine idle raise drop, cold… DJet help.
My 1.7 when started, the idle will go up and down, even for about an hour of driving. After an hour (here or there) the idle stays up and drops for awhile. And then it is fine… but can drop back down sometimes. On hotter days, it seems like it is faster to a normal running idle. I had 4 ideas: 1.)Cold temp sensors, I know there are 2 but I am unsure about it. Or how to test. 2.)Fuel/vacuum. This was my 1st thought, so I have new lines around the motor and the top of the tank. And the injectors have been re-built. but still could be djet. 3.)I have a really old muffler that needs replacing. warms up, can breate... 4.)Air in. (I know ill start some fights here, but it has the oil mess, I swear it can not get enough air) Any ideas? It’s a daily driver, and it is annoying as heck. |
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| Spoke |
Oct 27 2011, 03:19 PM
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#2
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Jerry Group: Members Posts: 7,158 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None 
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Does the idle hunting oscillate quickly, like once a second? Or is it slow like once every 5-10 seconds?
What is the highest RPM it idles at? |
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| broomhandle |
Oct 27 2011, 03:58 PM
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#3
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Member Group: Members Posts: 290 Joined: 26-June 09 From: Half Moon Bay, CA Member No.: 10,512 Region Association: Northern California |
QUOTE(Spoke @ Oct 27 2011, 02:19 PM)  Does the idle hunting oscillate quickly, like once a second? Or is it slow like once every 5-10 seconds? What is the highest RPM it idles at? every second. i think it gets to 3k, but eventually it will get to a proper idle. and stay like that, thats whats weird about it. |
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Posts in this topic
broomhandle Engine idle raise drop, cold… DJet help. Oct 27 2011, 11:03 AM
Philip W.
Engine idle raise drop, cold… DJet help.
My 1... Oct 27 2011, 11:08 AM
Philip W.
Engine idle raise drop, cold… DJet help.
My ... Oct 27 2011, 11:25 AM broomhandle MSP and AAR? Oct 27 2011, 11:19 AM r_towle Check your TPS setting and make sure youare really... Oct 27 2011, 11:20 AM McMark Vacuum leaks. Oct 27 2011, 11:30 AM r_towle
Vacuum leaks.
That too.
To expand on this.
I do... Oct 27 2011, 12:03 PM broomhandle i thought it was vac lines as well, but i replaced... Oct 27 2011, 12:14 PM Philip W.
i thought it was vac lines as well, but i replace... Oct 27 2011, 01:20 PM r_towle MPS is manifold pressure sensor...the little pinap... Oct 27 2011, 12:58 PM broomhandle Cool, thanks guys.... this will keep me busy on sa... Oct 27 2011, 02:04 PM McMark
You're assuming new lines = not vacuum leaks.... Oct 27 2011, 02:24 PM Rand Hunting idle means lean, which probably means vacu... Oct 27 2011, 02:28 PM broomhandle
Hunting idle means lean, which probably means vac... Oct 27 2011, 02:50 PM Rand
Hunting idle means lean, which probably means va... Oct 27 2011, 03:06 PM Rand That's a pretty significant vacuum leak. Does ... Oct 27 2011, 04:02 PM broomhandle
That's a pretty significant vacuum leak. Does... Oct 27 2011, 04:06 PM Thestigz06 Make sure the o-rings around the injectors are not... Oct 28 2011, 01:35 PM Spoke With the engine idling, spray carb cleaner on all ... Oct 28 2011, 02:27 PM |
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