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Old 11-23-2014, 05:25 PM   #1
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Low idle

Ok hello. I'm back. So just put the spark plugs in. Car is running better. But idle is still weird. When I really slow down idle at 500 rpm. When it should be 700. When car is warm. And I restart it and throw it in rev right away rpms go crazy and my cars bucks for a few seconds. Meaning it revs high then low and continues. So I changed out TPS and iac the two things I'm going to are maybe those censors are bad. Or my cops need to all be changed. I did a continuity test and it read all good. Where should I go next. I know we have been working this issue for some time. But I must be missing something. But I must say. Regular driving. It drives great. Just at 5-10 mph sucks.


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Old 11-24-2014, 06:21 PM   #2
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Welcome back Rollo!
Still having idle problems huh?
You'll have to refresh our memories a bit...
It's been a while and I know that you've done all of the tune-up items now, with the exception of the coils, I can't remember, did you try changing the boots and springs? And I'm assuming that there are no stored codes.
Did you check for vacuum leaks EVERYWHERE, including the air intake between the MAF and the TB? Also, any exhaust leaks?

I'm still suspicious of that goddamned IAC...
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Old 11-24-2014, 06:30 PM   #3
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Ok so changed the spark plugs. Changed iac changed TPS. Did not replace boots. Now I did a continuity test on the cops. They were good. Now should I try and rebuild them all. Maybe bad connection on te coil. There are no codes. Checked all vaccum leaks. Checked that's. But don't know about exhaust leaks. Car dose not stall anymore. Just idle is still weird. The car drives fine but that idle at low speed stop and reverse bugs the hell out of me. Rpms are like 500 at a stop sign. Ad sometimes when I put it in reverse the rpms go crazy and the car bucks. I'm about to just send it to a shop. If I can't figure it out.


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Old 11-24-2014, 06:32 PM   #4
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I just don't remember where I got that iac from. I want to say I got iac from rock auto and the TPS was from autozone


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Old 11-24-2014, 06:51 PM   #5
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Yeah, I know that you had done most everything.
Definitely change the boots and the springs on the cops! They're relatively inexpensive and easy to do.
Im not sure if we ever got into the charging system. If you haven't already done so, check the output of the alternator... a weak alternator can cause many mysterious problems to occur.
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Old 11-24-2014, 06:58 PM   #6
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do your lights dim when the idle drops
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Old 11-24-2014, 07:00 PM   #7
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No lights stay the same


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Old 11-24-2014, 07:02 PM   #8
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Yea I figured the cops would be cheap to rebuild. but I will check the alternator today when ever I get home. I should only read 12
V on that alternator right.



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Old 11-24-2014, 07:06 PM   #9
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there is an idle reset process. Have you tried that
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Old 11-24-2014, 07:08 PM   #10
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here is a thread that might help you Idle re-learn - works!
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Old 11-24-2014, 07:09 PM   #11
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Quote:
Originally Posted by rollo1987 View Post
Yea I figured the cops would be cheap to rebuild. but I will check the alternator today when ever I get home. I should only read 12
V on that alternator right.



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At least 12.

You really want to check how many AMPS that it is putting out. It should be close to 100... If memory serves.
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Old 11-25-2014, 08:21 AM   #12
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How do I test for amps. Thanks hello. I will check it out after work


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Old 11-25-2014, 02:55 PM   #13
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With the engine off, the battery voltage should be no lower than 12 volts. With the engine running, the voltage should be approximately 14-15 volts.
If you dont have the equipment, I think that Autozone/'O'Reilly and the like can tell you the amp output.
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Old 11-25-2014, 05:03 PM   #14
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I have a muti meter at the house


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Old 11-25-2014, 09:08 PM   #15
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I dont believe they an tell you the amp output at advance and autozone. when i worked there, all we could do was clamp it on, then test the battery cranking amps, then for the alternator, they turn the car on, and then it checks it at idle and compares it to 2000 rpm. Im sure it checks the amperage, but i dont remember seeing any number reading on it for the alt amperage. It does let you know if you got a bad diode though. but i was pretty skeptical about that charging system tester when i worked there.

and the machine that they use inside if you bring the alternator in, you type in the part number for their brand and it tests it compared to that part numbers stats. but still, doesnt tell you the amperage.
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Old 11-26-2014, 08:20 AM   #16
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Couldn't check last night worked late getting these new m1151 service done before dec when everyone goes on leave. Check it today. We get released at 12.


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Old 12-07-2014, 04:58 PM   #17
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Low idle

Can I test for amps on a multi meter


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Old 12-07-2014, 05:12 PM   #18
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I know the answer to all of this kind of ****.





Plus it will make your car cooler than everybody elses.
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Old 12-07-2014, 07:21 PM   #19
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Check the voltage first like I outlined above. If that's not right, you'll know there is something wrong.
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Old 12-07-2014, 07:21 PM   #20
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I checked the voltage when I first had the issue. It was all good


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Old 12-07-2014, 07:28 PM   #21
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14-15 volts with the engine running?

My battery charger has the option to read amperage output so that's how I checked mine. I'm not sure about your multimeter... Play around with it and see if you can get it to read amperage.
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Old 12-09-2014, 04:35 PM   #22
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I just got a good battery charger. I will check it out


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Old 12-11-2014, 11:34 PM   #23
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Yea so I'm done. I'm taking it a dealer. As much as I rather nuke. Dealer than take it there. I am just tired of trying.


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Old 12-11-2014, 11:52 PM   #24
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It sucks that you have to do that but it may be the best thing. At the very least, hopefully, they can diagnose the problem.
Make sure to keep us posted on what the problem is.
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Old 12-11-2014, 11:54 PM   #25
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Yea I need to save up some money. The dealer charges like 120 per hour. I hope it don't take that long. I will prob give them two at the most. If not I'm finding a cliff to have fun with


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Old 12-12-2014, 02:10 PM   #26
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So my journey will be ready today to pick up. Now I drop off the mustang. The service writer is my old writer from dodge so he going to hook me up


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