Stuttering at 6k WOT.
#1
Stuttering at 6k WOT.
93 FD, new ported engine, non seq, all mods, PFC.
Getting stuttering around 6k WOT. Just stumbles plus the car feels slow as ****. It started doing this lately, really feels slow at WOT, but feels really good at 1/4-1/2 throttle. Um any thoughts? Need anymore info.. let me know.
Getting stuttering around 6k WOT. Just stumbles plus the car feels slow as ****. It started doing this lately, really feels slow at WOT, but feels really good at 1/4-1/2 throttle. Um any thoughts? Need anymore info.. let me know.
#2
Do it right, do it once
iTrader: (30)
Go to the diagnosis connector, hook GND and TEN pin together and watch the check engine light. Report codes.
Codes are given in a sort of morse code way.
Example:
LONG blink, LONG blink, short blink, short blink, short blink would be code 23. Long blinks are the first digit, short blinks are the second.
Jeff
Codes are given in a sort of morse code way.
Example:
LONG blink, LONG blink, short blink, short blink, short blink would be code 23. Long blinks are the first digit, short blinks are the second.
Jeff
#5
PFC has been on the car.. the car is running too rich, though one night it ran flawlessly and didn't break up, then the same night it started having the problem.
-Plugs are new. I've gone through all the simple crap... thinking it might be a bad ignition coil low tension harness, or bad ground?
-Plugs are new. I've gone through all the simple crap... thinking it might be a bad ignition coil low tension harness, or bad ground?
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#13
Rotary Freak
Upgrade ignition ... or lean out your fuel mixture
I had the same problem after I added an upgraded fuel pump. I got hesitation above 5k rpm at WOT. I figured that I was running too rich. Since I am running an M2 stage 3 ecu, non-programmable, I had no way of leaning out my fuel mixture. I ended up buying and installing an HKS twin power ignitionn amp. The car works much better now. I think the increased spark duration is doing a better job of buring more of the fuel...Try it out.
#15
Senior Member
I have the same issue. I'm still working on it. I got new plugs and new wires with the same result. I have new ignition coils i have yet to install. I'm working on getting a new ignition harness. I'm hoping one of these things will solve the problem.
#19
MAP sensor is hooked up.. i can tell when thats not on.. lol.
The PFC isn't tuned exactly, but it was able to make pulls before. I'm running BUR9EQ non platinums all around, i've tried the HKS box, and i don't have any emissions equipment anymore. Everything is blocked off.
This is a simple engine bay.. 3 vacuum lines.. no emmissions. So i'm a little confused on to why. i never have enough time to mess with it, but i'm sure it might be the harness.. it is 10 years old and baked.
The PFC isn't tuned exactly, but it was able to make pulls before. I'm running BUR9EQ non platinums all around, i've tried the HKS box, and i don't have any emissions equipment anymore. Everything is blocked off.
This is a simple engine bay.. 3 vacuum lines.. no emmissions. So i'm a little confused on to why. i never have enough time to mess with it, but i'm sure it might be the harness.. it is 10 years old and baked.
#20
Senior Member
Join Date: Aug 2002
Location: Navarre, FL
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I had a similar thread recently, and someone posted a link to the following thread:
https://www.rx7club.com/forum/showth...threadid=70779
It is suggested, that the 93 harnesses had a problem that will make them miss. The thread has a picture of the old (with ground) and new (without ground) harness. Last weekend, I changed the coils and harness, but unfortunately, haven't been able to run the car yet, because I'm waiting for UPS to bring my a new turbo control solenoid this afternoon.
Anyway, the part number of the harness is N3A3-18-05Z, and they're $57.04 at Mazdaformance.
Good luck,
https://www.rx7club.com/forum/showth...threadid=70779
It is suggested, that the 93 harnesses had a problem that will make them miss. The thread has a picture of the old (with ground) and new (without ground) harness. Last weekend, I changed the coils and harness, but unfortunately, haven't been able to run the car yet, because I'm waiting for UPS to bring my a new turbo control solenoid this afternoon.
Anyway, the part number of the harness is N3A3-18-05Z, and they're $57.04 at Mazdaformance.
Good luck,
#22
Chimera Driver
Join Date: Jul 2001
Location: Birmingham, AL
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I've got the exact same issue. I'm changing out the plugs and wires this week. I'm running extremely rich so that's what I attribute it too. I'll let you know if it fixes the problem.
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