SOURCE: rough idle
fuel filters rarley cause idle problems. i would look at the egr valve or possible vaccume leaks.
SOURCE: speedometer, check engine, hazara and tcs lights stay on,
Hi,
It ken be many problems,bad contact ,clamping force,tcs/abs unit.
The best you ken do is conect the TECH2 to check def.codes!
SOURCE: 2003 Silverado rough idle, idles good after "check engine" light
Check your o2 sensor voltage, those trucks are real bad for o2 sensors, and yes if one sensor is reading 0mv, the others will start to drop out, and the vehicle will run very, rough. You also may check fuel system pressure, should be almost 60p.s.i. If its alot lower, Id be looking into a fuel pump. If that vehicle is drive-by-wire (no throttle cable), the throttle bodies get very dirty and cause that concern also. Id start by having the vehicle scantested.
SOURCE: Engine light is blinking and it runs very rough/low power in gear.
Check the coil pack. Same symptoms on mine. It went at 74,000.
You can get the resistance specs from a shop manual. I have been told the plastic engine cover traps heat and makes short life of the coil pack. I removed the top engin cover, cosmetic only after replacing mine. You will probably need spark plugs also they are probably fowled by now. If you have not changed spark plug wires in awhile in would not hurt.
SOURCE: I have a 2000 buick lesabre. The fix engine soon
It NEVER was the camshaft sensor! Unless, you've removed the engine lately, which I doubt.
RUN to Advance Auto Parts and buy a can of "SeaFoam" and add to your gas tank per instructions...drive at least 100 miles and the problem should go away...IF it doesn't you'll have to replace the O2 sensors in the exhaust system...Any good mechanic should be able to do this for much less $$ than the dealership DO NOT go to the dealer for repairs!
Good Luck
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