Question about Saturn SL1

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I have a 2000 Saturn SL1 that would start out fine in the moring but by the time I drove 25 miles to work it would be idling at 3000 and stick there or come down VERY slowly. I replace the ICV. Still had problem. I then replaced the TPS and it seemed to work better for a couple of weeks, however, it started acting up again. It seems when the weather is cold it starts this problem. My check engine soon light came on yesterday and the code indicated a gas cap problem but I replaced that about two months ago!!!! Any ideas please?

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  • Saturn Master
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Sounds like a vacuum leak at the canister or vacuum lines, lift the hood, start the car and listen for a hissing sound after it warms up, on the fender/frontend area there should be a black canister with vacuum hoses connected, check all the hoses end to end for leaks, there is a vacuum that is created in the tank that is controled (vented gas cap), if there is no vacuum in the canister to the fuel tank, this will cause the check engine light to come on (faulty gas cap). vacuum leaks cause the RPM to increase, I am surprized that's the only code you have. most cars have a diagram under the hood of the emissions.

Posted on Dec 29, 2010

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Posted on Jan 02, 2017

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I have a 2004 Jeep Grand Cherokee Laredo 4x4 with the 4.0L. It has approximately 150k miles on it. I started the Jeep with 1/4 tank of fuel in it and it started rough and acted like it was going to die....


long post.
ill reduce it for you.
misfires. (is RPM below 700 then misfire can be normal) for idle speed controls dead.
ISC the isc controls speed, of idle,.
mine stuck like zillion times, in 400k miles. endless.sticking
mine was a tiny gutless stepper motor drive ISC valve.
the cone valve is side gets nasty and sticks (
(PCV gases caused as seen on all engines)
i clean it.
the proof is the easy press of right foot easy raises idle back to 700rpm and engine stops misfiring.
ever get a tuneup this decade or running spark parts 500,0000 miles
for the new world record.?


now the tricky part of ISC, , fully explained in the SM serv. man.
the PCM learns its behaviors.
it learns all hot start settings and cold
so when you key on, it goes to the correct HISTORICAL spot.
if it can move there(sticks) engine car race.
or run too slow,
cold start would be worse, as hot isc is more closed
so if sticks there closed, the next cold start will be horrid
some newer manuals telly you to add 5% throttle if car is hard starting this is so common.

clean it. end story.
ISC

Mar 09, 2017 | 2004 Jeep Grand Cherokee

1 Answer

2000 Saturn sl1 has loud engine noise which seems to be either the (dead) a/c unit, something else on the serpentine belt (very few miles on it), or it could be the timing belt (which I read is an issue...


the best way to determine the cause of the noise is to remove the drive belt and start the engine for a few minutes. if it is in the drive belt components then the noise will cease. if not then the noise will remain.

Jul 14, 2011 | 2000 Saturn SL

1 Answer

2002 Saturn SL1, 72K miles. Hasn't been driven in


Single click? More battery is needed. Id change the battery, or slow charge it.
Might also be the security system shutting down the starter. Common on GM vehicles. Heres a link on that. http://vatspasslockpasskeysecurityhelp.yolasite.com/

May 27, 2011 | 2002 Saturn S-Series

1 Answer

When you first crank my Saturn SL1 it idles at 3000 rpm then drops down to 2000 rpm.I've changed the idle sensor & the throdle sensor but it does the same thing. joetaravella@aol.com


that is because the reason the vehicle is idling so high is because there is a vaccum leak somewhere and it is sucking in cold air

Feb 01, 2011 | 1998 Saturn SL

1 Answer

2000 Saturn SL1 started stalling after rear brakes replaced.


check and see where he jacked the car up. he could have smashed the fuel lines

Mar 11, 2009 | 2000 Saturn SL

2 Answers

97 Saturn SL1 leaking antifreeze, high RPMs, uses excessive gas


two places to check.... the water pump or one of the frost plugs has failed. what colour is the exhaust smoke ?

the other problems could be from the engine overheating so much

Feb 23, 2009 | 1997 Saturn SL

2 Answers

92 SL1 won't start, turns over but not getting gas, or floods


Try pulling the engine coolant temp sensor, They often crack not sure why but the ceramic tip cracks makes the car hard to start, the car's idle may race while shifting gears, and often smokes. The sensor is on the right side of the engine when looking at it on the head. Easy to change and get too

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1 Answer

1999 saturn sl1


Sounds like you have one of two problems. If the car has over 80,000 miles on the odometer, your idle air control motor (basically an electrical solenoid valve which allows additional air into the motor past the closed throttle valve) is sticking open.
The other possibility is a vacuum leak. I would try removing the IAC (idle air control motor) and cleaning it using aerosol carb or throttle body cleaner. This is available at any auto parts store. Re-install the valve and see if there is an improvement. If it improves but reverts to it's old behavior (usually within a day to a week) you will need to replace the valve.
Charlie

Jun 25, 2008 | 1993 Saturn SL1

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