Question about 1982 Porsche 911

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High RPM misfire

Misfire (not backfire) only at rpm greater that 4000 in my porsche 911 (1981). Seem to be worse when the engine is hot and well into operating temp.(not overheated)

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Posted on Jan 02, 2017

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SOURCE: porsche 911 horn

maybe the other one is out of order, check the wire see if it connected .

Posted on Jul 16, 2008

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SOURCE: Hi, I have a 1997 Porsche

misfire :-------- try checking your 02 sensors /fuel pump and filter.

for 51 cylinder misfire :---
Change the coil. Period. Very easy to remove from the vehicle if it's a 4 cyl. Follow that spark plug wire from the spark plug to the other end. What it's attached to you should replace
for 54 cylinder 5 misfire :---First you have to eliminate the most obvious problems, like spark plug and spark plug wire. If you replace those and you still have a misfire, then it's a good idea to look for a vacuum leak in the intake manifold

Posted on Mar 07, 2009

mecanica03
  • 911 Answers

SOURCE: Engine misfire above 3500 rpm only, 911 Carrara 3.2 1987

check for clogged fuel filter, ignition coil , distribuitor rotor

Posted on Jun 10, 2009

66 chrgr
  • 1011 Answers

SOURCE: 2005 pt cruiser misfire low rpm

Have your plugs and wires checked for replacement:)

Posted on Jul 31, 2009

  • 67 Answers

SOURCE: 98 dodge ram 1500 5.9 multiple cyl misfire. cyl 1

did you check to verify that you have the wires in the correct order possible distributor pick up bad

Posted on Nov 12, 2009

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I have 1999 Volvo C70 2.3 Turbo and it won't rev past 4k rpm. It idles fine,but stumbles and hesitates when the pedal is pressed. The CEL is on and the codes are for a cylinder misfire and an oxygen sensor...


4000 rpm is pretty high..it may have a fuel cut off for extremely high operation to prevent blowing it up..why so high?? most run between 2200-3000rpm..not 4000...

Dec 23, 2013 | Ford Ranger Cars & Trucks

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What does obd code p0301 on 2002 pt cruiser mean?


Trouble Code: P0301

Cylinder No. 1, 2, 3 or 4 Misfire Detected

Trouble Code Conditions: Engine is running; atmospheric pressure, fuel level, battery voltage, engine speed, engine load are above minimal predetermined specifications; the engine is not in fuel cutoff and intake air temperature and coolant temperature are within normal operating ranges; there are no DTCs relating to ECT, CMP, CKP, MAP or IAT Sensor, to Crank rationality, to Crank Sensor Learn invalid, or to System Voltage. If total misfires detected are greater than 7% during the first 1000 rpm, or are over 3% after the first 1000 rpm, or are 25% during any 200 rpm with suspect cylinder misfire counter more than 80% and no other cylinder misfire counters above 80%, this DTC will set. The MIL will flash after first trip occurrence and will be steady after second trip.

Possible Causes:


Fuel system problems existErratic CMP or CKP Sensor signalsIgnition system problems existEngine mechanical problems existPCM has failed

Jan 29, 2013 | 2002 Chrysler PT Cruiser

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2002 buick regal ls engine misfire at 3800-4200 rpm


That's normal; this protects your engine from over-rev damage.

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Misfiring on right side at low rpm.


could be a catalytic converter or o2 sensor. really would need to hook it up to a proper scan tool to view live data while running.

Mar 31, 2010 | 1999 Porsche 911 Carrera

1 Answer

Looses Power at high RPM's


Hello! A cylinder misfire can be something as trivial as needing new spark plug wires, to having a dangerous lean condition in the fuel mixture. Assuming that you have a stock, un-modified car, with a stock, un-modified PCM, my suggestion would be to swap the coil packs, to isolate whether or not the 1 - 4 coil pack is faulty.


Hope this helps, and thanks for using FixYa!

Oct 02, 2009 | 1999 Pontiac Grand Prix

1 Answer

Misfire at 4000 RPM


you may be in need of a tune up. Try squirting some wate (with a squirt bottle not a hose) an look for arcing, aslo squirt around the coil, you should eather see or hear thedifferanceonce they are et.

Jul 21, 2009 | 2001 Pontiac Grand Prix

2 Answers

Shuddering at 400 rpm


if the engine light is flashing it means that i could be a misfire or a emission problem and its big enough to damage your catalytic converter.

Jul 05, 2009 | 1999 Honda Accord

1 Answer

Engine misfire above 3500 rpm only, 911 Carrara 3.2 1987


check for clogged fuel filter, ignition coil , distribuitor rotor

Jun 10, 2009 | 1982 Porsche 911

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