Ok so this is odd tonight I was driving home an warmed up the motor to about 180ish pretty cold night but thats normal for my car. So I was driving spotted a camaro thought I would give it a quick beating. I havent had this problem till tonight I dont know if its just cause how cold it was outside or what. So I got on it first at about 5000k started to stumble like it was missing or bogging. Then pulled second spun an the whole time it was bogging an stubbling. So I thought ok I'll let it go let this dude go on him way cause I'm not going to risk my motor. Drove off an was bummed out.

So I eased into boost a little later still stummbles an felt like it was just to rich. A/f I wasnt really paying attention too. I know it was rich but i wasnt really staring it down. Usally there around 12 11 underboost im not trying to waste fuel an make it retartedly rich. Also Im only at about 8 9 psi. Tomorrow ill post up a datalog an have you all look at it. But for now does anyone have any thoughts.

 

It's going to be hard to figure out without a datalog.

180 seems a bit low though. Should hover around 185 or so assuming the thermostat works properly.

 

yeah my gauge is a little off i changed my thermostat to a lower opening one. Because a long time ago when i was street i was having heating problems i think i changed it down to the 170 175 something low like that. But i would say it was about 25 degress outside last night. but im going out now to check some stuff im going to try to turn my fuel down a little

 

so i came to a conclusion that i might be topping my 550s out. I got some venom 720s so ill put them bad boys in change the injector part of the ms an go from there. also i dont know but i might have had a leak on the vac line that goes inside the car to the ms

 

How do you know you are topping out the 550s?

And wait, you don't have upgraded injectors anyway?

 

cause i was poor lol. No i put in some 720 on monday. I still have some problems with it kinda boggin though. Its weird now its not as bad like its still cutting out at times though. I went through my wiring an its alll clean an nothing touching or grounding. I got on it the other day an i flooded in in second pulled to thrid an at the top end of third it bucked like the car shut off ill post up a log an see if you have any thoughts. Aaron i heard that you blew the na is that true

 

It helps to have a datalog if you expect a wiring problem because it would show in the log as a loss of signal.

I didn't blow up my turbo-NA. I blew two transmissions and a rear end, however. Currently waiting on parts for a TII diff swap.

 

maybe stupid Q, but, when was the last time you changed/checked your plugs/coils?

 

I have a feeling im just running to rich cause i can feel like its kinda loosing power an should be pulling stronger than it should. But sweet i heard that from this kid an was bummed out lol. I should really just post a data logg lol.

Also chad i cleaned them when i did my megasquirt so about 2 months ago. Coils are good leading are ran by msd 6al. an cas wire is sheilded grounded on one end an my main ground is to the block an the battery

 

Do you have your MSD box connected between the ignitor and coil? If you've just connected the MSD directly to the coil and are triggering with the 'Squirt, then you'll have to make some mods as the MSD box triggers opposite of the stock trailing ignitor.

 

yeah i have it set between the ignitor an the coil its self i no its not that cause i have had that on before i did the ms. I think its just a tuning problem i have to do some work cause it just snowed in colorado an my cold start is wacko

 

damn it. aaron i need your help realy fast i just got a new laptop an everytime i start the car megatune freezes but if i just turn the key on i can tune like that till it starts. I had a different version of megatune on my old laptop this one is megatune2.25p3 an evrytime i use this one i have this problem. I dont know were i got the other version but it just said megatune on the top.

 

change your sparkplugs what heatrange sparkplugs are you running? with megasquirt and all sort of tuning parameters the first thing we do is blame it on tuning and or a "problem" with the setup and forget the basics.

try running 7 leading and 9 trailing

 

notice I said change them not clean them...

 

Try reducing the buffers in your serial port settings.

Make sure you have the newest Megatune from the MSExtra documentation.

 

i already got it figured out it was dumping to much fuel at the top end an backfiring. i turned my fuel down an its good now. thats why i was asking aaron about my megatune.

 

oh tay lol like buckweet would say it. ill give that a shot tomorrow it snowed up here like crazy the other night but ill get this all took care of im pretty sure i got the problem fixed by turning fuel down i got on it before in the day an it was just black smoke out the back so now that i turned it down it seems to be alot better. i still need a good clear day to really get into it on the road but ill keep you posted

 

cool, hope you get it all sorted out. Happy New years!

 

so today that little sun of a bitch came back. An i now know what it is. The way i have my tach set up is i have the stcok an after market. The stock is the trailing coil an the aftermarket is the leading. I was driving down the street an all of a sudden out of the corner of my eye my tach for my leading jumped an went to zero hit a bump turned on bump off. So either i have a cold soilder joint in the ecu. It might be the shitty db37 i have. Ill have to check tomorrow its late dark an cold. so ill check the wiring an ecuy tomorrow for any shorts or crappy connections

 

so this little son of a bitch is back an it doing it again. i took some dudes out on a ride to so them my car an turbo n stuff. N this little bastard came back an its cutting at high rpms again. Ill makes a datalog tomorrow so i can figure this out