my cars RPM gos very very down ( almost quittin ),but in les than a sec,it goes up to 2000 RPM,and then gos down again..ect..ect
**when its cold,it quit completely,i have to give it gas until its worm,and after that it does the stuff i said up there**
ANY HELP PLEASE!!
90 mazda mx-6 4 CLND
thank you..
2007-06-20 18:41:23 · 10 answers · asked by slimjim 1 in Cars & Transportation ➔ Maintenance & Repairs
sounds like a sensor problem, possibly throttle positioning sensor
2007-06-20 18:44:58 · answer #1 · answered by RUSSELLL 6 · 0⤊ 0⤋
A bad (cracked) intake gasket will do this. The car starts to die out because the intake is sucking too much air, the computer compensates by giving it more gas, then the computer tells it that the idle is too high and bumps it down and then it starts over again. I had an 87' nissan that did this. Spray some starting fluid around the gasket area and when it revs up higher, you have found the bad spot.
2007-06-21 02:17:29 · answer #2 · answered by William B 3 · 1⤊ 0⤋
The spike in RPM is caused by the car computer trying to keep the engine from dying.
You probably need a tuneup because at low RPM the engine is getting close to dying. This is especially easy to notice in 4 cylinder cars, less noticeable in 6 or 8 cylinder verhicles.
2007-06-21 01:45:08 · answer #3 · answered by special-chemical-x 6 · 2⤊ 0⤋
does the check engine lite come on? if not, my gf saturn was doing the same thing and it turned out to be a faulty coolant temperature sensor
2007-06-21 01:46:35 · answer #4 · answered by oldguy 6 · 0⤊ 0⤋
could be an faulty throttle position sensor or an idle air control valve
2007-06-21 01:51:10 · answer #5 · answered by Anonymous · 0⤊ 0⤋
SOUNDS LIKE YOU HAVE A AIR LEAK SOME WHERE ARE YOU MIGHT WANT TO CHECK THE FUEL SYSTEM MAKE SHURE IT IS GETTEN THE RIGHT AMOUNT OF FUEL TOO BEST WAY TO SOLVE THE PROBLEM IS TO CHECK FOR LEAKS AND MAKE SHURE THERES NO LEAKY LINES AND IF THAT DOESNT WORK IM SHURE IT WOULDNT COST MUCH TO GET IT FIXED AT A SHOP OK THANKS AND I HOPE THIS HELPS.......
2007-06-21 01:50:38 · answer #6 · answered by Popeye 4 · 1⤊ 0⤋
Sounds like it is way past time for a tuneup.
2007-06-21 01:48:54 · answer #7 · answered by Anonymous · 0⤊ 0⤋
its not idling correctly, u need to have it taken to get some diagnostics done. i think a sensor has gone out.
2007-06-21 01:45:08 · answer #8 · answered by Ryan B 3 · 0⤊ 0⤋
sounds like you need to adjust ur throrttle control
2007-06-21 01:44:15 · answer #9 · answered by Anonymous · 0⤊ 0⤋
you gotta mess with your idle control
2007-06-21 01:52:40 · answer #10 · answered by Sledder 2 · 0⤊ 0⤋