Hey guys,
Have the gm s/c on with rapid 5's gapped at .035 ( I know the manual says .050). Running 91-94 octane with no pings. Don't really want to take it to gm, but the engine light flashes if i when at the top of 3rd or 4th if driving really hard from a stop.
Anybody have a similiar problem, or think its just something to do with the secret cams throughing something off. Whats the gap the others are using with no problems?
Nate
Evolution of Cavyboy-->C22t--> C24na--->c24s/c
1995 Cavalier W/2k1 Engine
GM S/C 13.940@99.78pmh w/2.068 60ft
Turbo ecotec, 5 PSI non intercooled.....autolite 103's gapped at .060. no misiferes for 8k miles.
I know its different setup and different engine, just posting for your reference.
can u run a scan to see what the CEL is?
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- Sold my beloved J in April 2010 -
note...have the rk plug springs and thinking maybe i should do a 0.030 gap. But it hesitates as it is from idle to start in 1st. Also, from reading some posts, TR6's.. how many stages colder are they??
Nate
Evolution of Cavyboy-->C22t--> C24na--->c24s/c
1995 Cavalier W/2k1 Engine
GM S/C 13.940@99.78pmh w/2.068 60ft
I have the same plugs as you gapped at 0.037, I was fine for a week, but after some abuse Friday I got flashing CEL's 2 times.
Why not use Delco plugs gapped at 0.050 like you're supposed to? Maybe with the gimmick plugs and the smaller gap you're not getting enough spark.
my s/c has only been on a week , and no flashing cel yet
ive got the tr6's , but i had a extra set from when i had the turbo and ive got them gapped at 35-36
get rid of the RK springs and put in some stock ones and see what happens.
check your coil pack housing and see if that is bad. (carbon tracking).
regapped plugs to .032 and will be going for a long drive to my inlaws, so i'll see what happens.
Checked coil pack housing, clean as a whisle.
Fingers crossed.
Next ill try .050 if this doesnt help.
97,
are the tr6's colder then tr55's?
Nate
Evolution of Cavyboy-->C22t--> C24na--->c24s/c
1995 Cavalier W/2k1 Engine
GM S/C 13.940@99.78pmh w/2.068 60ft
Wild Weasel wrote:Why not use Delco plugs gapped at 0.050 like you're supposed to? Maybe with the gimmick plugs and the smaller gap you're not getting enough spark.
Yep.^
Also for me, RKS springs/boots with that set up^^^ works perfect.
>>>For Sale? Clicky!<<<
-----The orginal Mr.Goodwrench on the JBO since 11/99-----
I've had the flashing CEL a few times, and all but ONE instance were at the track, near the end of a run.
I beat the hell out of mine all the time on the streets and have only had it happen once, and that was like a year and a half ago.
Lil Black Two Four wrote:I've had the flashing CEL a few times, and all but ONE instance were at the track, near the end of a run.
I beat the hell out of mine all the time on the streets and have only had it happen once, and that was like a year and a half ago.
mm.. I regapped the #5's to .032 and no hesitation (a little before..seems smoother), although it didn't' feel as fast. But could be due to the fact that i have 200lbs (clsoe to it) of tools in my trunk from doing a 2.4l swap into my cousins car.
Funny thing is, i forgot that i had about 12" of vacuum hose from map sensor nipple to map senor on the s/c, so that I had easy access to it to plug it in after reflash. I cut it down to about 4". Think that could have affected air to the map sensor at high rpm..causing a lean condition (missfire)?. Seems miniscule..but u never know.
Want to try the plugs with a bigger gap. But runs smooth. No cels today, but didn't get to beat on it with wife in the car.
Nate
Evolution of Cavyboy-->C22t--> C24na--->c24s/c
1995 Cavalier W/2k1 Engine
GM S/C 13.940@99.78pmh w/2.068 60ft
im not sure if they are colder than the t455's or not , i was told to get the 4177 tr6 when i had my 97 cav with a turbo
i bought 2 sets cause i had to order them , so i had a new set still in my tool box
so i figured rather than buy another set of plugs , id use what i got
hmmm, my car acts funny when its cold, well when i first start it up. If i try to jump right on it after first starting it up the car seems to just fall flat and really missfire. However if i drive the car for about a min then its completely fine and no issues at all. I have also had a flashing CEL a couple times. The same as you when really getting on it and in the top of 3rd or 4th gear. The CEL only flashes for a few seconds and then it stops. I havent had an opportunity yet to see whats going on with it but im gonna be following this thread very closely and adding my experiences to it seeing that we seem to have the same exact issue. I'm running the rapid fire #5 gapped at .030 and the car seems to be pretty good for me, im not really experiencing any missing with it after its warmed up. Last Sat at the track i managed to run twice and pulled a 13.63@103mph and dint get any blinking CEL's but tonight out on the street i ended up racing a 350Z and at the top of 4th blink blink it goes. Beat the Z by the way
607 Motorsports is your one stop performance and car specialties shop, we can do anything your imagination holds. Check us out at www.cardomain.com/id/jimmyc99z24
jimmyc99z24 wrote:hmmm, my car acts funny when its cold, well when i first start it up. If i try to jump right on it after first starting it up the car seems to just fall flat and really missfire. However if i drive the car for about a min then its completely fine and no issues at all. I have also had a flashing CEL a couple times. The same as you when really getting on it and in the top of 3rd or 4th gear. The CEL only flashes for a few seconds and then it stops. I havent had an opportunity yet to see whats going on with it but im gonna be following this thread very closely and adding my experiences to it seeing that we seem to have the same exact issue. I'm running the rapid fire #5 gapped at .030 and the car seems to be pretty good for me, im not really experiencing any missing with it after its warmed up. Last Sat at the track i managed to run twice and pulled a 13.63@103mph and dint get any blinking CEL's but tonight out on the street i ended up racing a 350Z and at the top of 4th blink blink it goes. Beat the Z by the way
Ran 13.63!! WHat else do u have under the hood??? What do u launch at??
Nate
Evolution of Cavyboy-->C22t--> C24na--->c24s/c
1995 Cavalier W/2k1 Engine
GM S/C 13.940@99.78pmh w/2.068 60ft
you can check out my site for everything if you would like, but the engine has alot of modification. Larger TB, fully built head (pnp, larger valves, titanium springs etc.) custom camshafts, arp bottom end, header full exhaust, ported gm s/c intake, 2.6" pulley, cooling mist alcohol injection = about 10.5 psi, theres alot more as well but those are the major ones
607 Motorsports is your one stop performance and car specialties shop, we can do anything your imagination holds. Check us out at www.cardomain.com/id/jimmyc99z24
yup same problem here i get the 300 code random multiple misfire, ive tried plug gaps from .030 to .050, msd, no msd, replaced the alternator and serpentine belt and it was gone for weeks now its back again, im totally baffled only thing I can pin it on is a lean condition
1989 Turbo Trans Am #82, 2007 Cobalt SS G85
ported gm s/c intake? tell me more.
i found a company that does s/c porting. he said he can do mine. i am not sure if i want to go threw with it at all yet. IF you look where it bolts up to the t/b inside the s/c it is really small. I am sure opening that up will yeild some gains.
i have never had a flashing CEL, but my computer is a 96. Only goofy light i got once was a "system too rich code" when i got on it into boost by mistake at a low speed /rpm in 4th gear.
i need to borrow my buddies scan tool so i can monitor the CEL in realtime and see whats going on, im gonna clear my computer and then see what codes it throws, as for the ported intake i did it myself, ive been porting and polishing heads and intakes for years. I have a flow bench and all of the porting tools here in our shop. What i did was remove the nose drive and the internals of the s/c then went at it with the die grinder and porting tools, i opened up the intake side quite a bit so that it would not only be smoother but also be matched to my head thus to not cause any disturbance of the air, then as you said i worked a bit on the tb side, i made the transitions smoother and polished them as well as porting it out a bit to better utilyze the bigger TB. I have no idea what gains i saw from this because it was all done before i ever supercharged the car. It would be my best guess that the throttle response would be increased quite a bit and the middle and top ends would see the greatest gains. I wish i had some progress pics, unfortunately im terrible about that sort of thing and never remember to take pics
607 Motorsports is your one stop performance and car specialties shop, we can do anything your imagination holds. Check us out at www.cardomain.com/id/jimmyc99z24
jimmyc99z24 wrote:i need to borrow my buddies scan tool so i can monitor the CEL in realtime and see whats going on, im gonna clear my computer and then see what codes it throws, as for the ported intake i did it myself, ive been porting and polishing heads and intakes for years. I have a flow bench and all of the porting tools here in our shop. What i did was remove the nose drive and the internals of the s/c then went at it with the die grinder and porting tools, i opened up the intake side quite a bit so that it would not only be smoother but also be matched to my head thus to not cause any disturbance of the air, then as you said i worked a bit on the tb side, i made the transitions smoother and polished them as well as porting it out a bit to better utilyze the bigger TB. I have no idea what gains i saw from this because it was all done before i ever supercharged the car. It would be my best guess that the throttle response would be increased quite a bit and the middle and top ends would see the greatest gains. I wish i had some progress pics, unfortunately im terrible about that sort of thing and never remember to take pics
How is the car with the 2.6" pulley? DOes it run too hot without the alcohol injection?
Nate
Evolution of Cavyboy-->C22t--> C24na--->c24s/c
1995 Cavalier W/2k1 Engine
GM S/C 13.940@99.78pmh w/2.068 60ft
C24NA, honestly i have no idea how hot the car runs without alcohol because i have mine set up so it automatically comes on at 4psi. I like it better this way, im seeing about 10psi with the 2.6 and the alcohol, if your interested in a pulley id be willing to sell you my pulley boys 2.6" because im going to go with a 2.5" just let me know if your interested
607 Motorsports is your one stop performance and car specialties shop, we can do anything your imagination holds. Check us out at www.cardomain.com/id/jimmyc99z24
NGK- TR-6"S got rid of po-300 random missfire. gaped @ .030
runs nice and hard..
Chris
'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08
UPDATE: Plugs regapped to .032 has solved the problem
Also, i had close to 24" of vacuum line on the map sensor (to ease installation of 2 bar one at dealership after reflash) and cut that to ~4". No more miss fire, and not more fan coming on. Do have engine light on. HOWEVER, it was always on prior to s/c. Its the code for the 2nd o2 sensor. It doesn't like the high flow cat.
Thanks for the help guys!
Nate
Evolution of Cavyboy-->C22t--> C24na--->c24s/c
1995 Cavalier W/2k1 Engine
GM S/C 13.940@99.78pmh w/2.068 60ft
humm mine use to flash and some one told me to regap the plugs with a small gap but i didnt have time that week and just left it and kept the plugs gapped at the .050 and the light just stoped... only reason my light is on now is because of my IAC valve but i couldnt be botherd to get a new one right now...
The First Twin Charged jbody
blue car (R.I.P) - 240whp @7psi..
silver car - 305whp 315lbs.tq @15psi (91 Octane) or 420whp & 425lbs.TQ @20psi (94 octane+Alcohol Injection)
All dynos run on a Mustang dyno
