Question about 2002 Saturn L-Series

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02 sl1idles at 3000rpm when warmed up

When first started it runs at 2000 rpm and then drops to 1500 rpms.then it slowly goes up to 3000rpms and when coming to a stop it slowly comes back down to 3000.

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Posted on Jan 12, 2009

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Have an fx45.Should the tach read 25-3000 ROMs when moving at 75mph? Auto tranny seems like it should be in higher gear.


there is not info to be able to give a definite answer
to work it out
you have top know the diff ratio, wheel tyre circumference to be able to work from rpms of the engine to road speed
However as a pointer, most cars will be around 3200 rpms at 60mph as this will be direct drive and od causes a drop in rpms
Being an automatic find yourself a good section of low traffic road and start from stop slowly increase the rpms and watch the rpms. keeping the accelerator steady you will see when the auto changes by a drop in rpms. slowly increase road sped until you see the next drop in rpms and so on. Over drive normally comes in around 55 mph or around 3000rpms
I would think that it is working because 3500rpms at 75mph is reasonable rpms to be expected. If it wasn't working I would expect the rpms to be around 3800 to 4000.at 75mph

Feb 07, 2015 | Cars & Trucks

1 Answer

1997 acura cl 2.2 revs up to 1500 rpm and down to 1000 rpm just several seconds after start


Cars are design to run at a higher idle at start up to warm them up quick. There is a sensor that reads water temperature and tells your car's computer how fast to idle. Your RPMs seem slightly high but not out of the norm. Does idle ever drop to around 600/800 after about a minute? If not, your engine temperature sensor maybe defective.

Mar 16, 2014 | Acura Cars & Trucks

1 Answer

1999 suburban gage oil pressure is 0 when it warms up. rpm drop to 3-4 rpm when oil pressure goes to 0. Sounds good, runs excellent -no noise. Actually it sound better then most new cars. It is so...


I looked at info for 1500--5.7L engine.
6 psi @ 1000 rpms
18 psi@2000 rpms
24 psi @ 4000 rpms

Sometimes, you can use analog gage in place of oil pressure sending unit and double check oil pressure that way. If oil pressure is actually low, if high mileage engine, I doubt replacing oil pump will help. I just wanted to add, check oil pressure engine warmed up.

Oct 15, 2017 | 1999 GMC Suburban

1 Answer

2000 suburban 1500 right before air on and right before it turns off enigene drop to about 350 rpms


correct rpms should be ~800rpm ac off, and ~1000 rpm ac on.
idle up switch is broken or vacuum hoses attached to idle up switch has leaks.

Jan 31, 2013 | 2000 Chevrolet Suburban

1 Answer

02 grand cher. 55000 miles. 4.0 engine. intermiten problem. on start up RPM's go to 2000. stays there briefly, drops to 1500 briefly, then slowly drops to 1000, late goes to 800 to 900. jeep dealer...


buffalo man said engine doing what it should do. friendly neighborhood mechanic said it go 1250 RPM on start up, then drop to 700 to 800
found defective part outside throttle body. runs OK now

Oct 26, 2009 | Jeep Grand Cherokee Cars & Trucks

1 Answer

IDLES HIGH RPM(3200)


sounds like the tps is bad or idle control motor

Feb 13, 2009 | 1996 Mazda MX-6

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