Question about 1985 Nissan 200SX

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S13 sr20det redtop high idle problem

I have an 1985 nissan 200sx turbo I put the sr20det in ran fine for almost a year but now it wont drop below 1,000 rpm and have the idle tweak all the way down still does it

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  • Dave  C
    Dave C May 11, 2010

    You have a vacuum leak somewhere in the intake. The engine can't run without air so if the throttle plate is closed the air must be getting into the engine somewhere else.



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SOURCE: 1985 nissan exa turbo

a intake problem possibly a fuel pump on the way out or air and fuel filter check plugs and injectors

Posted on Jul 22, 2008

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SOURCE: I have a redtop Sr20det and was wondering what a

G'day mate , standard ratio for leaded petrol was 14.7/1 with unleaded fuels it will be slightly higher , around 15/1 due to the lower ' thermal efficiency ' of the fuel. hope this helps

Posted on Apr 20, 2010

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SOURCE: 1995 Nissan Maxima automatic high idle

Idle is set by the compuer, check vacuum lines, a broke ,cracked or missing line will cause higher idle

Posted on Jun 20, 2010

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It could be the gasket on the turbo

Posted on Sep 08, 2010

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SOURCE: Loss of power at 2400 rpm's

Can any one help please!!! my 84 300zx AE gradually looses its power whether it's in driving or parking mode. It will restart easily every time. Before the engine looses its power, I step on the gas (while driving/parking), the engine will roar very smoothly and normally. But once it start to loose its power, even when stepping on the gas, it still gradually dies. I have replaced fuel filter but did not help.

Posted on Sep 08, 2010

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1 Answer

Engine runs but sputters when put in gear

Sounds like leak in high pressure side of turbo to inlet manifold tube.
Results in gutless or no performance but idle & revving in neutral ok.
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May 26, 2010 | 1987 Nissan 200SX

1 Answer

I have a redtop Sr20det and was wondering what a safe air/fuel ratio is.

G'day mate , standard ratio for leaded petrol was 14.7/1 with unleaded fuels it will be slightly higher , around 15/1 due to the lower ' thermal efficiency ' of the fuel. hope this helps

Apr 20, 2010 | 1990 Nissan 240SX

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1986 Nissan 200Sx Turbo idles rough and drives rough. timeing rechecked 3 times and we just put a new rotor and Distributor cap on and it runs a little smoother. i have checked the Compression and it was...

How white? I would get a can of carbcleaner and spray a little here and there around the intake area to see if you have a vacuum leak. If the smoke is real white like the clouds the you may have an internal coolant leak to a cyl.

Aug 26, 2009 | 1986 Nissan 200SX

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is the turbo working? if fitted! the standard turbo is not too reliable, also get a good tune up,problem may be fuel related.

Nov 22, 2008 | 1985 Nissan 200SX

1 Answer

1994 200sx s14

Sounds to me like you have a leak somewhere in the intake system. The idle fluctuation sounds like a vacuum leak- and of course, when the turbo spools up, you have positive pressure replacing vacuum. Look for a loose hose clamp or a torn hose, etc. etc. By the sounds of it, you shouldn't have any trouble finding the leak.

Nissan Scope Certified Technician- 10 + years experience in Nissan dealership

Nov 03, 2008 | 1996 Nissan 200SX

1 Answer

Where is ccoling temp sender 1.6 96 nissan 200sx

This is for the 2 litre SR20DET engine so not sure if that's what you have - never heard of a 1.6 version. Below is the exploded diagram and a test for the sensor.



Oct 20, 2008 | 1996 Nissan 200SX

2 Answers

Nissan 200 sx s13

The way to check your coils is to start the car and unplug them one by one and see if the note changes, if you unplug one and the note dosnt change then thats the one thats fried.By swapping them around itl still be down a cylinder and will be hard to tell.But yes i bet it will be a coil as i have a nissan also and they do fail and makes it sound like a subaru and smell off petrol.I hope this helps.
P.S i love those S13 200sx, great shape.

Sep 08, 2008 | 1988 Nissan 200SX

1 Answer

Idle too high +goes higher when put in gear (manual transmision

IAC valve problem. Nissan has a updated harness (with one way diode inside of the harness) to prevent backfeeding for the IAC valve and a new IAC valve also gets installed. That's where I would look. IAC valve or "idle air control" valve.

Aug 23, 2008 | 1998 Nissan 200SX

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