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Old 04-30-2012, 10:22 PM   #1 (permalink)
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Default Whats your advice?

Hi all,

Well I just sold my big patrol and now wanting a smaller cheaper 4wd to have some fun in. I have found a little sierra that looks to be in really good shape with quite low K's. Although there is one little thing that im not sure about and was hoping someone could clarify what the problem could be and if its easy and cheap to fix before i commit to buy it.

So here it is, its a 1995 sierra with 132'000 k's and has a lot of work just done on the motor with receipts to prove. Heres the list of what he has had done to it.

Engine was fully stripped, inspected and put togehter with...
* Fully recon exchanged head
* New head bolts
* New rings, all bearings and bottom end serviced.
* New timing belt kit.
* New clutch kit.
* New spigot bearing.
* New oil & Temp switch
* New Thermostat.
* New water pump.
* New Battery.
* New fan belt and all hoses
* New soft top with dark tint.
When the motor was put back into the car, the mechanic gave the car a full service with new plugs, coolant, oil filter etc. he also checked all oils and fluid levels.


Now there is one little problem he says thats wrong with the car. When slowing down to a stop the car almost/sometimes stalls OR when stopped it revs high.

Thats all the info I can give you atm as I am having a look at it tonight, though im trying to get some info about this problem before I go have a look and say i will buy it so i know what i am looking at.

Any help/ideas would be great!

If all turns out well I cant wait to get this little beast!!
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Old 05-04-2012, 08:40 PM   #2 (permalink)
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Hey sound like an ok buy ,by the way what model patroldid u have, i have a mq lwb with spring overs and i want to put a three inch lift also did u do any mods to yours before it was sold.
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Old 05-04-2012, 09:55 PM   #3 (permalink)
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Sounds like you either have a vacuum leak or your IAC (Idle Air Control) valve is not operating properly.

If you have a vacuum leak due to a broken or missing vacuum hose, the idle will speed up from the normal 850 rpms up to1500-2000 rpms. The effect is the same as barely pressing the throttle and slightly opening the butterfly valve allowing more air to enter the intake manifold.

The IAC valve is ECM controlled to help the engine maintain that 850 rpms under load or when the gas pedal is not applied and the butterfly valve if closed. If the IAC is not functioning, there may not be enough air in the mixture to keep the engine running. The IAC is basically a computer controlled vacuum leak.

If you don't have FSM (factory service manual), here is the link to section that covers the TBI models.
Ack's FAQ 1990 to 1992 Samurai Supplemental Service Manual
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Old 05-05-2012, 04:47 AM   #4 (permalink)
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Awesome thanks for the info. Ill be taking it to a guy that reckons he will be able to pin point the problem.

As for my patrol I had, yeah I had done quite a fair bit to it. 33" muddies, 2" lift, snorkel, dual bat, and a whole bunch of other stuff. Was a good 4by though just cost me way too much!! Jump on patrol4x4 if your not already, heaps of good info on there.
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