IDEAS? check engine light- very awkward.
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Registered User
Joined: Sep 2005
Posts: 624
From: New York
Rep Power: 45
IDEAS? check engine light- very awkward.
Hey guys.
this is what happend.
day 1: driving and floring the car several times, everything seems fine. Then alittle later floor it again and boosts normal till 1.0, 1.1 but while boosting till max the check engine light flickers on and off, just like when traction control kicks in, the light comes on and off. very wierd.
so basically now thier is no yellow round check engine light, but a check engine diagnosted in the built in computer "check" function.
day 2: drive normal, car feels fine, floor it a few times, car boosts normal(1.0, 1.1) pulls hard, however feels abit wierd pulling hard... ( all my "pulls" are say 3rd gear to redline then 4th till redline).. doesnt feel that smooth. during one of the pulls same thing, yellow round check engine light comes on and goes off (just like psm would do) in the built in control panel thier is a check engine failure, however no -check engine yellow light- present. i shut the car off and restart. Upon restarting no evidence of check engine failure. Not in the dash, and not in the "check" function.
day 3: while i floor it , car boosts normal, (1.0, 1.1) however again, not that smooth. feels like its not getting the right A/F ration.. (just a nonmechanical guess)... also while pulling in 3rd the check engine light comes on and stays on. The first 2 times the check engine light came on then off like Psm. this time it stays on for good and still on now.
I do have an evo intake, k16s, flash and exhaust.
Had car for 10k miles and never had a check engine.
I will change out to stock intake to see how it reacts....
Have appointment with dealer on Monday, just want get some ideas.
thanks.
this is what happend.
day 1: driving and floring the car several times, everything seems fine. Then alittle later floor it again and boosts normal till 1.0, 1.1 but while boosting till max the check engine light flickers on and off, just like when traction control kicks in, the light comes on and off. very wierd.
so basically now thier is no yellow round check engine light, but a check engine diagnosted in the built in computer "check" function.
day 2: drive normal, car feels fine, floor it a few times, car boosts normal(1.0, 1.1) pulls hard, however feels abit wierd pulling hard... ( all my "pulls" are say 3rd gear to redline then 4th till redline).. doesnt feel that smooth. during one of the pulls same thing, yellow round check engine light comes on and goes off (just like psm would do) in the built in control panel thier is a check engine failure, however no -check engine yellow light- present. i shut the car off and restart. Upon restarting no evidence of check engine failure. Not in the dash, and not in the "check" function.
day 3: while i floor it , car boosts normal, (1.0, 1.1) however again, not that smooth. feels like its not getting the right A/F ration.. (just a nonmechanical guess)... also while pulling in 3rd the check engine light comes on and stays on. The first 2 times the check engine light came on then off like Psm. this time it stays on for good and still on now.
I do have an evo intake, k16s, flash and exhaust.
Had car for 10k miles and never had a check engine.
I will change out to stock intake to see how it reacts....
Have appointment with dealer on Monday, just want get some ideas.
thanks.
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From: TX, USA
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If you make a pull in 3rd gear lets say and the car hesitates around 4500 rpms... ist the plugs for sure.
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2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
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2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL
Registered User
Joined: Aug 2003
Posts: 3,787
From: Edmonton, Alberta
Rep Power: 209
Originally Posted by AIRjordan23
p0301 cyl 1 misfire
this is the code autozone read.
spark plugs....right?
this is the code autozone read.
spark plugs....right?
This is what you need to do.
A) Change all the plugs
B) Replace cylinder 1 coil pack
c) If you still get the code you may have an issue with the cylinder 1 injector.
Originally Posted by Zippy
You came to the correct place. I amd deeply familiar with P0301 & P0305 (cylinder 1 and cylinder 5 misfire detected)
This is what you need to do.
A) Change all the plugs
B) Replace cylinder 1 coil pack
c) If you still get the code you may have an issue with the cylinder 1 injector.
This is what you need to do.
A) Change all the plugs
B) Replace cylinder 1 coil pack
c) If you still get the code you may have an issue with the cylinder 1 injector.
__________________
2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL
2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL
Registered User
Joined: Aug 2003
Posts: 3,787
From: Edmonton, Alberta
Rep Power: 209
P0301
508 Misfire, cylinder 1
Diagnosis conditions
•
A cycle of 1,000 crankshaft revolutions is evaluated (for misfire
damaging to the TWC, 200 crankshaft revolutions). The misfire
rates are compared with a threshold value. If the misfire rate is
greater than the threshold value, a fault is recorded in the memory.
damaging to the TWC, 200 crankshaft revolutions). The misfire
rates are compared with a threshold value. If the misfire rate is
greater than the threshold value, a fault is recorded in the memory.
•
The Check Engine Malfunction Indicator Lamp (MIL) is switched
on and stays on when the misfire rate lies above the threshold
value at which the emission limit values are exceeded during two
consecutive driving cycles (in the case of EOBD 3 driving
cycles).
on and stays on when the misfire rate lies above the threshold
value at which the emission limit values are exceeded during two
consecutive driving cycles (in the case of EOBD 3 driving
cycles).
•
If the misfire rate may lead to permanent damage to the TWC,
the Check Engine MIL flashes. If the misfire rate is no longer
reached during the first journey, the MIL goes out. If the rate is
reached during the next journey, the MIL flashes. If this misfire
rate is subsequently no longer reached, the MIL changes to a
continuous light.
the Check Engine MIL flashes. If the misfire rate is no longer
reached during the first journey, the MIL goes out. If the rate is
reached during the next journey, the MIL flashes. If this misfire
rate is subsequently no longer reached, the MIL changes to a
continuous light.
♦
When using a block heater (for heating coolant), start and driving
off difficulties can occur or misfiring if the block heater was connected
for less than 4 hours.
off difficulties can occur or misfiring if the block heater was connected
for less than 4 hours.
♦
When the fuel tank is driven to empty, misfiring can occur. For
this reason the fuel level in the tank is also stored in the memory
when misfiring occurs. If the tank was nearly empty, there was
probably no fault. Erase fault memory and road test vehicle.
this reason the fuel level in the tank is also stored in the memory
when misfiring occurs. If the tank was nearly empty, there was
probably no fault. Erase fault memory and road test vehicle.
♦
In the event of a short circuit to B+ or ground in the oxygen sensors
ahead of the TWC, the mixture becomes too lean or too
rich. This can cause misfiring. If, in addition, an oxygen sensor
signal fault ahead of the TWC is stored in memory, first correct
this fault and then road test the vehicle.
ahead of the TWC, the mixture becomes too lean or too
rich. This can cause misfiring. If, in addition, an oxygen sensor
signal fault ahead of the TWC is stored in memory, first correct
this fault and then road test the vehicle.
Possible fault cause
♦
Fault in ignition system
♦
Fault in injection system
♦
Flat-base tappets (valve lift fault)
♦
Mixture too rich
♦
Mixture too lean
♦
Mechanical causes:
Registered User
Joined: Aug 2003
Posts: 3,787
From: Edmonton, Alberta
Rep Power: 209
Originally Posted by MARKSKI
Mike, did you resolve your misfire problems?
AhA, I hope thats it...
__________________
2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL
2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL
Thread Starter
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Registered User
Joined: Sep 2005
Posts: 624
From: New York
Rep Power: 45
guys, why would i need to replace the coil packs for cyl 1.
from what i understand, 20k miles is what the stock plugs last for... its basically time to change... so im considering this routine maintainance.
Why would coil pack 1 be bad. does the misfire happen because of the plugs, or because of the coilpacks. just trying to understand.
Also, if it was only the plugs and not the coilpack, would i get a differnt code?
from what i understand, 20k miles is what the stock plugs last for... its basically time to change... so im considering this routine maintainance.
Why would coil pack 1 be bad. does the misfire happen because of the plugs, or because of the coilpacks. just trying to understand.
Also, if it was only the plugs and not the coilpack, would i get a differnt code?