It's probably a coil breaking down , have a scan tool hooked up an have misfires checked to see which cylinder is missing .
Ignition Coils
Each ignition coil has an ignition 1 voltage feed and a ground. The engine control module (ECM) supplies a low reference and an ignition control (IC) circuit. Each ignition coil contains a solid state driver module. The ECM will command the IC circuit ON, this allows the current to flow through the primary coil windings for the appropriate time or dwell. When the ECM commands the IC circuit OFF, this will interrupt current flow through the primary coil windings. The magnetic field created by the primary coil windings will collapse across the secondary coil windings, which induces a high voltage across the spark plug electrodes. The coils are current limited to prevent overloading if the IC current is held high too long. The spark plugs are connected to their respective coils by a short secondary wire. The spark plugs are tipped with iridium for long life and efficiency.
Drive it long enough like that (with it misfiring ) the check engine light will flash . This is to warn that a catalytic converter damaging event is taking place . This would also set a DTC - diagnostic trouble code
DTC Descriptors
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DTC P0300 Engine Misfire Detected
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DTC P0301 Cylinder 1 Misfire Detected
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DTC P0302 Cylinder 2 Misfire Detected
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DTC P0303 Cylinder 3 Misfire Detected
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DTC P0304 Cylinder 4 Misfire Detected
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DTC P0305 Cylinder 5 Misfire Detected
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DTC P0306 Cylinder 6 Misfire Detected
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DTC P0307 Cylinder 7 Misfire Detected
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DTC P0308 Cylinder 8 Misfire Detected
SOURCE: hard starting.. check engine on P0101
The filter is after the sensor. If the filter is dirty, it should be replaced anyways. If the sensor is covered in dirt, than yes clean it first.
Lastly replace MAF
SOURCE: I have 96 gmc 350 vortec. missing really bad. Ive
ou need to check compression on all the cly. do you know which cly is dead?
SOURCE: p0102 Grand Prix
P0102 is ---- mass or volume air flow circuit, low input.
Check the wires going to the maf sensor and at the connection. If all seems ok, you might need a new sensor, seeing how it ran a little better when disconnected.
SOURCE: can I clean my Maf sensor and throttle body myself
Yes it will help car run better. Take off any hose that goes to card so that you can see down throttle bore. Start car. Grab throttle linkage and figure out how to move it so that you can make the engine go faster. Begine to spray inside throttle body using little red hose that came with carb cleaner. While you are spraying the engine will try to cut out move the throttle linkage to speed up the engine so it won't cut out. Keep spraying all around inside and outside throttle bore.
SOURCE: trying to change my water
I normally don't pass the buck, but go to e-how.com and depending on whether your
car is supercharged or not they tell you step by step how to remove your belts ,and
where the tensioner is located. there isn't enough space on this page to give you directions.
good luck!
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