okay, so my R53 has been acting up a bit as of late, has trouble turning over, miss firing at WOT. So i changed plugs and wires, and while changing them i noticed that my intercooler couplers were dry rotted and cracked, so got some new ALTA ones.

so after installing all the new parts, NOT A DAMN DIFFERENCE!!!!!

so my question is do i need a new coil?? or what???
thanks....
Ryan

 

Has the car been modded? Has it been properly maintained? Do you have a CEL on? More details would be a big help....

 

as hemiheaded said, more details. sounds like a fuel problem, but with such limited info its a 100% guess.

 

Possible high RPM lean out is a choice, but again, 100% guess.

 

Trouble starting = compression usually. Run a compression/leakdown test.

How many miles do you have on your car?

 

i've got 71k on the car. CEL light has been on since i put my header on (no cat) also has 17% pully, alta exhaust, CAI, walbro 255 fuel pump.
the car is well maintained by myself.
when driving it tonight i noticed that if you don't just mash it to the floor, it's fine, but 3/4 to WOT it skipps and hic-ups, as soon as you let out it shoots flames out the back. idle is not rough, nor does it miss when revved with no load.

 

A lot of mods and no tune? That could be your culprit right there. With those mods and no tune, it could be in safe mode.

 

Run a compression check and leakdown...

 

will do sir.....thank you for the help

 

are you running a 02 simulator?

 

You all are silly....Its an injector....

 

things i'd check;
compression
header install rather for exhaust leaks
map sensor (either get a new one or hit the current with carb cleaner)
injectors gummed up? (not sure about this one... highly unlikely)

 

Perhaps it's your belt slipping on the supercharger pully? I have a 17% reduction also and was having a similar problem with boost spikes at WOT. Went to see Chad at Detroit Tuned, installed new/shorter Belt, no more spikes!

 

Wait, so flames aren't supposed to shoot out the back?

 

Do you have the part# of that belt? Thanks

 

I don't have a part number but here is a link to the belt

http://www.detroittuned.com/products...20061102225055

 

UPDATE::: ruled it down to a fuel problem..... whenever i take LEFT turns my car falls on it's face and bucks hard. if i make a LEFT u-turn, it completly shuts down! once i straighten back up, it kicks back in. so i think i'm gonna take out the walbro255 and put the stock pump back in. and hope for the best

 

Gonna say it sounds fuel starved, while your in there (may already have) change the fuel filter...

 

so i pulled the fuel pump to inspect any problems.....nothing. so i popped off the fuel line to the tank (passenger side) and there was no pressure in the line!!!!! where am i losing it??? stuck injector possibly?????

UKSUV i think i might get an "i told you so"