my car it stock rebuilt 10k ago+cam+stall+LT y pipe cutout(closed most of the time) stock muffler(for quietness)
stock injectors, 225 intank pump, msd coil and wires with relatively new plugs (5k)......recently checked the fuel pressure it was low with the stock pump so i put a walbrough in and checked it again i was told its actually LOW by a few psi??? on 2 differant gauges
madz tune 6600 shift
my car runs really rich at idle...its so bad outside the car my eyes water and you can smell it inside to. its not fumes it raw gas....then driving around it seems fine..but at wot it seems as if somethin is holding it back like its running in a safe mode...i dyno with a cc306 1.6 rocker made 295, 312??? times at the track were 8.4@85, with no spin, its slow i know the car even through an auto is down about 30 hp
i had a code for maf map and o2 ive replaced the maf and o2 and dont have any codes cutrrently but still runs crappy...and rich...with low fuel pressure, what gives?
any ideas, or somebody in tx wanna help take a look
daniel

 

Kinda a hard post to undertand. Did you have it hooked up to the wideband when you dynoed it? You need to do that and send the graphs to Ion so he can tune accordinly. From what ive heard he generally makes tunes a little rich to keep ya on the safe side.

 

Do you have any data logs? with out those it will really be just stabs in the dark.

 

no wideband...i showed the dyno graph to ion and the computer back he leaned it out some but said there is a problemwith the car...bc a/f was 9:1 across the board...no data logs i dont know how to get any? who does it how do you do it?

 

Sounds like you may have 1 or more leaky injectors. If you have a way to scan the car, see if one bank is running richer than the other. If so, swap the injectors from side to side and see if the rich condition follows and switches banks. If so, you have a problem with 1 or more of the injectors on the rich bank. Leaky injectors can cause fuel pressure to drop a little because the injector is leaking fuel even when it's closed.

 

I have a VERY SIMILAR problem except my car runs perfect after a bit of driving. I am throwing MAP and O2 Codes... even codes for the two that are supposed to be deleted. Car runs VERY RICH at idle... burns everyones eyes.

 

maybe a bad/leaking FPR?

pull the vac line of off it and see if it has fuel in it

 

no fuel in the vac line...
about a month ago i did have a maf, map and o2 code but i replaced o2 and maf cleared the code and i no longer have any codes...it could be leaky injectors is there a way to remove the fuel rail and prime the pump and check? how do you clean them?
daniel

 

how do you guys clean injectors? simple injector cleaner

 

and how do you get a data log? can a regular mechanic do it or does it take lt1 edit anda laptop?