Pettit Super Charger Owners
Well new front O2 sensor and still getting the same DTC P0171 code (System too lean ON 2 Fuel system).
Before I forget I also got code DTC P0507 (Idle air control system RPM higher than expected ON 2 CCM) a few days ago but it hasn't comeback since I cleared it.
It is the P0171 that keeps coming back.
This time I took the fuel pump out and cleaned everything (sock looked cleaned) and my fuel pressure is within specs.
Checked my MSD coils with a timing light. They are good.
Cleaned the TB butterfly.
Sprayed about 1/3 can of carb cleaner all over the engine bay and no idle changes (only if I sprayed at the air filter to confirm).
Took the car for a spin, full tank and various full throttle/gears/speed modes. OBDII and AEM AFR the same ranging from 11.9 to 12.1
The code shows within the first few minutes after cranking the car. I crank, it idle flutter between 900 and 1200 few times. Then to 1500 for few seconds and slowly down to 1100. After that it idles fine. (Yes, I reset the room fuse and did the pedal dance many times).
Could it be that my TB is bad or going bad?
Before I forget I also got code DTC P0507 (Idle air control system RPM higher than expected ON 2 CCM) a few days ago but it hasn't comeback since I cleared it.
It is the P0171 that keeps coming back.
This time I took the fuel pump out and cleaned everything (sock looked cleaned) and my fuel pressure is within specs.
Checked my MSD coils with a timing light. They are good.
Cleaned the TB butterfly.
Sprayed about 1/3 can of carb cleaner all over the engine bay and no idle changes (only if I sprayed at the air filter to confirm).
Took the car for a spin, full tank and various full throttle/gears/speed modes. OBDII and AEM AFR the same ranging from 11.9 to 12.1
The code shows within the first few minutes after cranking the car. I crank, it idle flutter between 900 and 1200 few times. Then to 1500 for few seconds and slowly down to 1100. After that it idles fine. (Yes, I reset the room fuse and did the pedal dance many times).
Could it be that my TB is bad or going bad?
Last edited by marsredr100; Nov 5, 2011 at 07:23 PM.
stop being stubborn and check the injectors, it doesnt matter that they are new
you a/f's are too high?
it sounds like the primarys may not be doing their job--since you are having idle problems?
did you spray around the w/m nozzle sites?
where on the efi log does it start showing a more lean a/f than normal?
you a/f's are too high?
it sounds like the primarys may not be doing their job--since you are having idle problems?
did you spray around the w/m nozzle sites?
where on the efi log does it start showing a more lean a/f than normal?
Last edited by olddragger; Nov 6, 2011 at 08:13 AM.
Found my problem. 
It was a disconnected vacuum hose hidden behind my lower intake heat shield blanket. Somehow it came off even though it had a zip-tie. I goes to the 1/2 pipe that runs between LIM and the thermostat housing. Back on with two zip-ties and no more issues.
It was a disconnected vacuum hose hidden behind my lower intake heat shield blanket. Somehow it came off even though it had a zip-tie. I goes to the 1/2 pipe that runs between LIM and the thermostat housing. Back on with two zip-ties and no more issues.
what vacuum line is that? I dont have it. Is it the one that goes to the jet air thingy?
If so then thats the reason as I removed mine.
If you have the jet air still in there--worm clamp that bastard! It can blow off
That had to be a pretty big vacuum leak......?
Glad you found it---want to sell that new o2 sensor....? lol. I will buy it for preventive maintainance.
If so then thats the reason as I removed mine.
If you have the jet air still in there--worm clamp that bastard! It can blow off
That had to be a pretty big vacuum leak......?
Glad you found it---want to sell that new o2 sensor....? lol. I will buy it for preventive maintainance.
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From: Boosted...
RX8 & RX7 owner
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From: So. California
marsredr100- Thats pretty good. A 13.5 Pass @ 330hp.
My buddies El Camino with a 502 Stroke/Balanced ran 13.8 passes @ 108 mph at 500 HP/TQ... **** threw me in my seat. Im sure the feeling is similar in your ride if not more
What was your speed at the end of the 1/4? Did you top out?
My buddies El Camino with a 502 Stroke/Balanced ran 13.8 passes @ 108 mph at 500 HP/TQ... **** threw me in my seat. Im sure the feeling is similar in your ride if not more
What was your speed at the end of the 1/4? Did you top out?
had my tuning session with Steve Kan. Cam called Steve while I was there. I called him "Old man" -- like me.
We had excellent results, We left some on the table because I wanted a very conservative tune.
I guess my little LIM work payed off--as we saw something that Steve had never seen before---nor I he-he on this engine-hehehe.
We took it to 9K.
it was ambient temps of about 65F, my measure intake temp per Steve on the maf was 18C with a fan pointed toward the grill--guess my little mod on the front support beam/grill worked too hehe.
The lim runners where cool to the touch--that new bigger a/w intercooler/radiator has really worked.
with the water meth on i lost 10 rwhp and tq--i had only one 175cc nozzle post blower.
The car was NOT tuned for w/m. I will drop my nozzle size to a 60cc now --because it will be only used to he;p cool the intake charge will tracking. it is interesting that the a/f's did not change at all with the w/m on?? Go figure?
very conservative engine timing with max at 14. 14 degree split
I will get a dyno sheet posted sometime today but numbers.................
This is with the big pulley and ONLY 7 PSI BOOST.
RWHP 292
TQ 191. with TQ coming on board at 2.7K rpm
like me.We had excellent results, We left some on the table because I wanted a very conservative tune.
I guess my little LIM work payed off--as we saw something that Steve had never seen before---nor I he-he on this engine-hehehe.
We took it to 9K.
it was ambient temps of about 65F, my measure intake temp per Steve on the maf was 18C with a fan pointed toward the grill--guess my little mod on the front support beam/grill worked too hehe.
The lim runners where cool to the touch--that new bigger a/w intercooler/radiator has really worked.
with the water meth on i lost 10 rwhp and tq--i had only one 175cc nozzle post blower.
The car was NOT tuned for w/m. I will drop my nozzle size to a 60cc now --because it will be only used to he;p cool the intake charge will tracking. it is interesting that the a/f's did not change at all with the w/m on?? Go figure?
very conservative engine timing with max at 14. 14 degree split
I will get a dyno sheet posted sometime today but numbers.................
This is with the big pulley and ONLY 7 PSI BOOST.
RWHP 292
TQ 191. with TQ coming on board at 2.7K rpm
https://www.rx8club.com/attachment.p...1&d=1322317101
hope that came through ok.
interesting dyno---huh
remember this is on 7psi only
The blue line is with water meth on using one 175cc nozzle post blower
the green line is back in 2006 when we first started identifying ignition coil problems---all four of mine where very bad!
hope that came through ok.
interesting dyno---huh
remember this is on 7psi only
The blue line is with water meth on using one 175cc nozzle post blower
the green line is back in 2006 when we first started identifying ignition coil problems---all four of mine where very bad!
I would not recommend using this in a Renesis due to it's reputation for combustion deposit buildup. Premium unleaded should be fine if your fuel and timing tables are properly adjusted. If you insist on enhacing the octane level then use xylene or higher octane unleaded for dosing instead. The cheap & easy way will cost you a lot more down the road; pay me now or pay me many times more later .....
torco will be used for track only--so it will not be that much.
i have ran toulene/xylene before just messing around with it and the car seems to like it better than the torco. You just have to carry so dang much and it is getting expensive.
I am tuned for our 93 ethanol crap
i will be bumping up my self imposed redline of 7.5K to a little over 8K.
we left some on the table--steve told me that a little over 300 was doable-- but i was happy with this at 7lbs of boost.
We played with the apv a little but just decided in the end to leave it alone. Driveability is really good. Gas milage went up a tad also
boost held steady and no belt slippage--just a good day.
Road atlanta is next w/e.
i have ran toulene/xylene before just messing around with it and the car seems to like it better than the torco. You just have to carry so dang much and it is getting expensive.
I am tuned for our 93 ethanol crap
i will be bumping up my self imposed redline of 7.5K to a little over 8K.
we left some on the table--steve told me that a little over 300 was doable-- but i was happy with this at 7lbs of boost.
We played with the apv a little but just decided in the end to leave it alone. Driveability is really good. Gas milage went up a tad also
boost held steady and no belt slippage--just a good day.
Road atlanta is next w/e.
