Won't rev past 4800????

[racin4ds]

Looking for some ideas here guys, I'm a long time mustang owner (had 6 of em) but this is my first Terminator, just picked it up a month ago, anyhow the cars only mods are a Bassani Catted X, Flowmaster catback kit and a JLT short ram and 3.400" Billetflow pulley.

I've changed the plugs (NGK TR6) gapped at .032, went over the car with a fine tooth comb, cleaned the MAF etc and I can't figure out what is causing my issue. It goes straight to 10psi and pulls hard til about 4800-5000rpm then it falls flat on its face, literally like a rev limiter. I know I need a handheld so I can optimize the tune and datalog but I don't have the cash right now... any ideas you guys can give me?

I was thinking the coils? maybe the fuel pump? :??::??:

 

[stangposse]

Just stay out of it until you get it tuned.

 

[racin4ds]

Yea, I'm doing that now, but the 3.4" pulley isn't supposed to need a tune. They call it the "no chip pulley" And I really don't think its a matter of the PCM/tune. The more I think about it now the more I'm leaning towards it being a coil. Is there any resources as to how to properly ohm them out and test them??

 

[Stalker27]

Sounds like you have a pump goin out on you. Same thing happened to me

 

[racin4ds]

How in the world does one go about diagnosing and proving that? I don't have the cash right now just to drop the tank and replace both of them high dollar pumps

 

[cobracide]

Datalog a run.

 

[metaman]

Still running the stock sized belt? Sounds like severe belt slip to me.

 

[TVSCobra]

Log it can look closely at the Fuel pump duty cycle and fuel pressure drop. See if the FPDC is hitting 100%. It could be several things causing this, faulty COPs, faulty pumps, a malfunctioning MAF or Fuel rail pressure senor, etc. I would log this car or take it to a trusted tuner, get the 3.4 off of it and put a 2.8 or 2.76 on. Good Luck.

 

[racin4ds]

Thanks fellas, I know I really need to log it but unfortunately the wife and I are in the middle of buying a home and my play funds are ZILCH! I want to get an SCT Handheld here soon for it so I guess I'll just hold off til I can get a good log and see whats up.

Rice- Already have the 2.76 here on standby

 

[CanuckSnake]

In the same boat with ya,(started a thread a while ago) I'm waiting for some time to get the tune checked out. Car goes big time lean, I think the MASS is getting confused and shuting off the injectors.

 

[lxhatch302]

if its hitting a "rev limiter" its the fpdm or fuel pumps....i had the same issue a long time ago and replaced all of it and was fine afterwards...

pretty positive it was the FPDM that crapped out

 

[CanuckSnake]

I changed my FPDM and it didn't change anything that might be his issue, but it wasn't mine???????

 

[04SolidSnake]

Canucksnake.. Do you have the GT pumps in the stock hat? Does it do it all the time? Chances are you've had a hose come off at the y fitting, and you're only getting fuel from one pump. You'd be wise to drop the tank and have a peek.

For the other fellow, do you have any buddies with Cobras that have a handheld they can lend you? You don't have to marry the handheld to the car to datalog I don't believe.

 

[cobracide]

Until we get a datalog, everthing is just a guess. Spring for an X3 asap or this could end up costing you a lot more shortly.

 

[MJR_TRBL]

Sounds like you are running out of fuel. I have a diablo tuner that I will sell you cheap just pm me

 

[04cobra13]

sounds like a tuning problem. Id get it checked out asap you could be running lean up top. When i deleted my pprv it did the same thing and needed the tune worked out.. GL!

 

[racin4ds]

I don't have any buddies with an 03 and a handheld, already looked down that path

And I can't shell out the $400+ for a tuner at the moment, wish I could! Closing costs on my house just set me back $7k!!!

The car is mostly stock so I can't see it running out of fuel or maxing the MAF, (unless the pumps are bad I guess)

PM sent MJR TRBLE!

 

[2003snake]

Sounds like you have a pump goin out on you. Same thing happened to me

I have pumps if you are interested.

Cheers! Jason.

 

[CanuckSnake]

Canucksnake.. Do you have the GT pumps in the stock hat? Does it do it all the time? Chances are you've had a hose come off at the y fitting, and you're only getting fuel from one pump. You'd be wise to drop the tank and have a peek.

For the other fellow, do you have any buddies with Cobras that have a handheld they can lend you? You don't have to marry the handheld to the car to datalog I don't believe.

Thanks! I do have the GT pumps in the stock hat. It started intermittenly now its doing it all the time. I'm trying to get a fuel pressure gauge on it to check for that.

 

[CanuckSnake]

Fuel pressure is good 35 or so at cruise and it climbs under throttle to 50 or so until it hits the wall at 5000 then pressure climbs even higher. I don't know, hopefully it will snow soon and it can stop bothering me.