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mike switzer
mike switzer,
Category: Saturn
Satisfied Customers: 608
Experience:  lead diagnostic tech at Aamco
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On my 2003 saturn L200. when starting and engines fires off

Customer Question

on my 2003 saturn L200. when starting and engines fires off rpms increase to about 2500 rpm then goes right down to the 750-800 range. also whe going fromm park to drive rpms increase to about 2500 then right down to the 750-800 range . there is nothing touching accelerater at this time
Submitted: 1 year ago.
Category: Saturn
Expert:  Dan replied 1 year ago.

Hello, my name is***** your check engine light on? Does it run good otherwise? Thanks.

Customer: replied 1 year ago.
No. And it runs great after that.
Expert:  Dan replied 1 year ago.

Have you tried to see if unplugging the throttle position sensor helps?

Customer: replied 1 year ago.
No i havent. I do have a new one on the benches
Expert:  Dan replied 1 year ago.

Unplug sensor and see if problem stops, if so that is a good indication that the tps has failed. It is a fairly common problem too. Let me know, thanks.

Customer: replied 1 year ago.
I unplugged tps and it did not change anything.
Expert:  Dan replied 1 year ago.

Does high idle problem happen every time you start it? Unplug the idle air control valve and let me know if that helps. Thanks.

Customer: replied 1 year ago.
Hi Dan. I have put a new tos in no change I have taken out the iacv cleaned it reinstalled no change . I can't get until tmw am. I plugged in my scanner and it said code1599cruise control managementv
Customer: replied 1 year ago.
Got a new iacv this am have not installed yet.'
Customer: replied 1 year ago.
We'll I changed iacv. Changed fuel pressure regulater. It still goes up to 2500-3000 and then back down to normal. Same when we put in drive from park . ?
Expert:  mike switzer replied 1 year ago.

can you try unplugging the temp sensor and see if that does anything?

Customer: replied 1 year ago.
I unhooked the temperature sensor. ?
Customer: replied 1 year ago.
No change same thing is happening