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wont maintain steady idle?

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Offline kng254

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wont maintain steady idle?
« on: March 19, 2012, 03:20:32 AM »
1997 Suzuki sidekick sport 1.8L 158,912miles
Starts fine once warmed up wont maintain idle.
Once I stop at light the idle bounces below 800 and cuts off sometimes I can save it if I tap the gas pedal.
If I stop and let it run it will cut off. I cleaned E G R this weekend still same thing. Didn't improve. Visual inspection vacation lines they seem fine no leak sounds.

Any ideas. Thanks

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Offline kng254

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Re: wont maintain steady idle?
« Reply #1 on: March 19, 2012, 04:11:35 AM »
When I'm in the parking lot and I put the car in reverse It will stall sometimes.
 When I'm on the highway 2000-2500 rp m's feels like a miss. But no engine light comes on.
 I put the reader on got no codes. Pull MAF to make sure SES bulb in dash works (it does ).

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Offline DonD

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Re: wont maintain steady idle?
« Reply #2 on: March 19, 2012, 07:37:08 AM »
Mine was running crappy so I:

Checked and corrected the vac line routing...better.
Trimmed the ends off all the vac lines... better.
Adjusted the loose TPS...ah, much better!!


Central AZ
'90 Tracker
8k Smitty Winch
Man. hubs
Skids
Nerfs and sliders
Lockrite rear
OME susp
4.24 TC
ZOR Ft Bumper

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Offline kng254

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Re: wont maintain steady idle?
« Reply #3 on: March 19, 2012, 07:22:11 PM »
I was speaking to a guy at work about my car trouble. He suggested I unplug the electrical connection from my MAP sensor and if the car starts it means be that its bad.
Does this sound right?
« Last Edit: March 21, 2012, 01:08:23 PM by kng254 »

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Offline kng254

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Re: wont maintain steady idle?
« Reply #4 on: March 21, 2012, 01:06:33 PM »
Drove about 20miles with my MAP unplugged seemed to run better.

Does  this mean new MAP will fix my idle woes?

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Offline Rhinoman

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Re: wont maintain steady idle?
« Reply #5 on: March 21, 2012, 03:46:01 PM »
In your first posst you said you have a MAP, do you have a MAP or a MAF?
2000 Vitara 1.6, 3+3 Lift, 33"MTs, 5:83s, LWB brakes, Winch, Snorkel, Safari Rack
1986 SJ413K PickUp, 1.6L conversion.

OBD1 - Full diagnostics on a PC/Laptop: http://www.rhinopower.org

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Offline kng254

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Re: wont maintain steady idle?
« Reply #6 on: March 21, 2012, 04:24:57 PM »
MAF is at front of intake
MAP is out the back of intake comes off a small hose and mounts to firewall.
 MAP is the one I disconnected.

When I looked at the sensor location sheet those are the names that went to the sensors.

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Offline ranger88den

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Re: wont maintain steady idle?
« Reply #7 on: March 23, 2012, 01:40:54 PM »
Do you have CEL on, or even a CEL light when the ignition switch is in the accesory mode (first increment prior to starter engagement)?

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Offline kng254

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Re: wont maintain steady idle?
« Reply #8 on: March 24, 2012, 06:00:57 AM »
The ses light came on this morning. Put my reader on (basic one only reads and erase doesnt give info while driving ) it gave 6 codes
P1408,301,302 it gave the same 3 twice.
Did a search found out that 1408 is MDP circuit fault. Which also means map sensor fault. Fortunately I've already ordered a new map sensor it will be here monday.

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Offline kng254

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Re: wont maintain steady idle?
« Reply #9 on: March 27, 2012, 07:31:05 AM »
swapped out the MAP sensor its still surging when i stop and it feels like its missing (it is missing it gave a miss code this morning) between 2000-3000 rpm.
when it warms up it runs a bit better.
i raised the idle so it wouldnt stall when i put it in reverse(doesnt always work)

dont know if it matters but when i have radio,headlights and heater blower on the revs bounce also.

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Offline Drone637

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Re: wont maintain steady idle?
« Reply #10 on: March 27, 2012, 03:24:42 PM »
That sounds like you might have a grounding issue, if the number of electronics on affects things.
96 Geo Tracker, x-SJ-410,  x-White Rabbit, x-Project Trouble
Crawlers NorthWest
x-Trouble Racing

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Offline kng254

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Re: wont maintain steady idle?
« Reply #11 on: March 27, 2012, 07:35:41 PM »
how do i chase  a bad ground?
my left rear tail light never lasts more than a coupe of days i guess i start there.

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Offline Drone637

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Re: wont maintain steady idle?
« Reply #12 on: March 28, 2012, 12:09:59 AM »
Just take off the ground wires, clean them up.  Make sure you have a good ground cable going from your battery to the block and to the body.
96 Geo Tracker, x-SJ-410,  x-White Rabbit, x-Project Trouble
Crawlers NorthWest
x-Trouble Racing