Tach RPM fluctuations

Asked by Dec 07, 2009 at 04:44 PM about the 2003 Saturn L300

Question type: Maintenance & Repair

My veh. (totally equipped)81,000km Just replaced the MAF after my eng light ON. Since this time my RPM's fluctuate especially in warm weather. When I stop/go, the RPM's go up(normal) but when I stop(rev down to 250 ) and then rpm's level off like a yo-yo effect. This only happens at low speed(ie: traffic bumper to bumper, stop and go)Dealer is unable to locate source. ECM reprogrammed and throttle cleaned, EGR cleaned up out and still problem persists. All help appreciated to eradicate this problem.

2 Answers

115

MAP or IACV, Manifold Air Pressure sensor may be bad and telling the Idle Air Control Valve (which may be bad too) to stay open which would cause the high RPMs

1 out of 1 people think this is helpful.

Thanks for the reply, much appreciated however you mention my Rpm's are too high. This is not the problem. It rev's up normally as any car should. The problem is when I let the gas go, it rev's down to such a low RPM and then jumps back up to normal levels. The yo yo effect makes the car almost stall. In fact today approaching various STOP signs, I let the gas go and the RPM's dropped to a point that the engine stalled. 4 alarm bells rang but not a single dash warning light lit up indicating a malfunction ! I really need HELP on this issue !~

Your Answer

Add photo

Related Questions

Search Saturn L300 Questions

Saturn L300 Experts

#1 Tom Demyan
Tom Demyan
Reputation 460
#2 dandyoun
dandyoun
Reputation 270
#3 tenspeed
tenspeed
Reputation 100
View All

Related Models For Sale

Used Saturn L-Series
427 listings starting at $1,999
Used Honda Accord
711 Great Deals out of 87,160 listings starting at $699
Used Saturn VUE
39 Great Deals out of 2,054 listings starting at $1,200
Used Volkswagen Jetta
353 Great Deals out of 36,651 listings starting at $995

Used Cars For Sale

2005 Saturn L300 For Sale
35 listings starting at $2,995
2004 Saturn L300 For Sale
40 listings starting at $2,199