Rough idle / stalling after remote start install
Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=138949
Printed Date: April 29, 2024 at 5:10 AM
Topic: Rough idle / stalling after remote start install
Posted By: schmooot
Subject: Rough idle / stalling after remote start install
Date Posted: May 09, 2015 at 7:40 PM
I recently installed a command start system in an 04 I think Pontiac Montana. Using the Blade module the install went well. Now a week later the customer is complaining of rough idle and stalling. I found an obscure post on some forum about the tach wire being run too close to some of the ignition stuff so I relocated it but it seems to not have helped at all.
The engine light is on but I couldn't check what the code was due to my tool acting up. It is entirely possible that the issue is unrelated as it only seems to happen when engine is very warm. However I need to cover my bases before I tell him it isn't my problem.
Any thoughts?
Replies:
Posted By: ziggyb222
Date Posted: May 09, 2015 at 9:48 PM
Did you use a injector wire as your tach signal?
Posted By: howie ll
Date Posted: May 10, 2015 at 3:25 AM
You may have missed one of the IGN/ACC wires.
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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: schmooot
Date Posted: May 10, 2015 at 12:17 PM
tach signal I used the white wire at the ignition control module at back of engine. And I do have both ignition wires as the remote start works fine. The car idles rough regardless
Posted By: howie ll
Date Posted: May 10, 2015 at 12:20 PM
2 X 12V+ supply
1 X starter
1 X IGN
2 X ACC.
All done?
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: howie ll
Date Posted: May 10, 2015 at 12:23 PM
Does this rough idle happen all the time or just with the RS?
If it's all the time, logically not your problem.
Look to 02 sensor or ECU where it controls the mixture.
Initially, disconnect the battery for 20 minutes, reconnect then see.
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: schmooot
Date Posted: May 10, 2015 at 1:23 PM
howie ll wrote:
2 X 12V+ supply
1 X starter
1 X IGN
2 X ACC.
All done?
ummm
1 x 12v red
1 x starter yellow
2 x IGN pink white
1 x ACC orange
is what I have.
And again the remote start function works fine. So I know I have all the wires hooked up correctly. The vehicle stalls and rough idle when warm regardless of being remote started or not. It is just back in my shop because it started happening after the install
Posted By: howie ll
Date Posted: May 10, 2015 at 1:32 PM
I went by Directechs, I believe there was a problem with GM cars if the ACC wires weren't properly connected, check whatever guide you used, if it lists one IGN and 2 ACC, set it up the same.
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: howie ll
Date Posted: May 10, 2015 at 1:36 PM
Just looked again,
2 X IGN and 2 X ACC, your problem is the second ACC wire.
These vehicles are unknown in Europe but I remember from this site there were problems with GM vehicles around 05 ref the second ACC not being connected causing all sorts of problems inc. the engine warning light coming on.
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: howie ll
Date Posted: May 10, 2015 at 1:41 PM
You should have the following:-
Red constant 12V+ supply.
RED / white constant 12V+ supply
Yellow start
IGN 1 pink
IGN 2 white
ACC1 orange
ACC2 brown
Bet you haven't connected the brown.That wire colour rings bells to me.
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: howie ll
Date Posted: May 10, 2015 at 1:56 PM
Control harness, brown (-) ACC to relay 85
Fused 20 amps to 86 and 87
second ignition (brown) from 30
Diode across relay coil, 1N4004, band to 86.
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: schmooot
Date Posted: May 10, 2015 at 3:07 PM
SO I just need to put in another relay for a second acc. I will try that thank you. The wiring diagrams from this site do not list a second acc
Posted By: howie ll
Date Posted: May 10, 2015 at 3:55 PM
Obviously you'll have to test/check for yourself.
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: schmooot
Date Posted: May 10, 2015 at 4:14 PM
of course.
Posted By: davep.
Date Posted: May 11, 2015 at 11:57 AM
schmooot wrote:
And again the remote start function works fine. The vehicle stalls and rough idle when warm regardless of being remote started or not.
The rough running can't have anything to do with ACCY or IGN hook-ups for the Remote Start.
If it runs rough with the key, it's something else. You could try disconnecting your tach connection at the white wire on the Ignition Module, and see if that makes any difference. I can't think of anything else.
Posted By: davep.
Date Posted: May 11, 2015 at 12:04 PM
howie ll wrote:
but I remember from this site there were problems with GM vehicles around 05 ref the second ACC not being connected causing all sorts of problems inc. the engine warning light coming on.
It was/is the white wire, which is an IGN wire. It powers the transmission solenoids. If this wire isn't powered while running, the ECM will detect incorrect shift solenoid states, and set Diagnostic Trouble Codes's. As a result of the solenoid DTC's, the ECM will command MAX Line Pressure as a default pressure. This MAX Line results in very harsh shifts, and can result in internal transmission parts breakage.
IIRC, these DTC's are Type II. Ie they only apply for the current IGN cycle. So if the car is Remote started,then driven after key takeover, the transmission operation will be affected. If the car is started with the key, the DTC won't set, and everything is 'normal'.
If the DTC doesn't repeat in 50 ignition cycles, the DTC clears on its own, and won't show on a Scanner.
Posted By: howie ll
Date Posted: May 11, 2015 at 12:07 PM
Thanks that was the problem I was referring to earlier, just not sure because these vehicles are unknown in Europe.
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: howie ll
Date Posted: May 11, 2015 at 12:08 PM
One could also disconnect the tach wire in case that's affecting anything, seen that problem twice in Opels (Euro GM) and VW both using Bosch injection systems.
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: davep.
Date Posted: May 11, 2015 at 12:13 PM
davep. wrote:
You could try disconnecting your tach connection at the white wire on the Ignition Module, and see if that makes any difference. I can't think of anything else.
Beat you by 10 minutes, Howie.
Posted By: howie ll
Date Posted: May 11, 2015 at 12:20 PM
I know, had a really bad migraine all day, it's my only excuse!
I've been worried all weekend about the rough idle being there on either remote or regular start. I jumped to the second ACC as the reason but there might be 2 problems there.
Let's be honest I'm working on knowledge not experience with all US GM and Chrysler vehicles.
I've done a Bluetooth install and tracker on a 300, that's it.
OP did state that check engine light was on all of the time.
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: davep.
Date Posted: May 11, 2015 at 12:47 PM
howie ll wrote:
OP did state that check engine light was on all of the time.
^^ I missed this ^^
Get a scanner on it. DTC's are very good clues as to where to look for the problem. OBD II codes are sort of generic, in that a particular DTC applies to any vehicle, some DTC's are tailored to the specific make/model/year.
I find a Google with example "Code xxxx Pontiac 2004" will frequently get an explanation for the parameters that set the code, and he can go from there deducing if it's his fault or not.
Posted By: howie ll
Date Posted: May 11, 2015 at 12:49 PM
Trouble is in the first post he said his scanner was down. That's why I'm friendly with local garages!
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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: davep.
Date Posted: May 11, 2015 at 12:53 PM
One additional thought:
Look the engine over carefully for any loose or disturbed vacuum hoses and wiring connections. You may have inadvertently bumped something, or caused an old hose to crack while you were working in the engine compartment.
The DTC would tell you what system to look at. But a vacuum leak will make it run rough, and set an idle-control related DTC.
Posted By: howie ll
Date Posted: May 11, 2015 at 12:59 PM
X 2 with that one. The vehicle is 10 years old so the vehicle not OP's work is suspect.
Out of interest, in Europe a modern mainstream vehicle is built to last c. 7 years, a diesel about 4 before major incurring expenses with the diesel pollution equipment.
There are exceptions, Prius is used extensively around major cities as a taxi, they seem to go on forever, not that I'd want to be stuck behind one on a motorway!
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
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