Cuts off at high rpm's

[Arod5327]

Hey guys, sorry if I posted in the wrong forum, but I have a problem in my 03 cobra and I need your help, I have gotten the code po148 (fuel delivery error), but my check engine light is not NOT on! And At high rpm's around 5-5.5 my car just falls on its face at WOT, then about two seconds later, it picks back up. Its Mainly when in 3rd or 4th gear pulls. I've changed the alternator already so it's not that. Could it be the fuel filter, fuel pump, frps?? Any information would help guys! :shrug::shrug:

 

[jbou91]

Spark blowout? Inspect/replace plugs and take it from there

 

[Arod5327]

Spark blowout? Inspect/replace plugs and take it from there

Replaced spark plugs 6 months ago so it shouldn't be that :shrug:

 

[jbou91]

Doesn't hurt to check, also check the gap on the plugs. Should be around .030 or so

 

[THE_EVIL_TW1N]

I would check the spark plugs too. Could be that they are gapped wrong or that they opened (or closed) up. Has happened to me in the past. I hope you're not running platinum plugs.

 

[04DSGmonster]

Do you have the pprv delete done? if so check your "in tank" lines. Mine would run strong to 5,200rpm's and then just hit a "wall" i took it to a shop and had same code they didn't know what it could be. I had done the pprv delete a month or so before so i dropped the tank and one of the lines had a hole in it so i replaced it and everything is good

 

[Nolimit]

i had a some what similar issue once, greg at ret went through everything in the the car and we finally replaced the fuel pumps/fuel hat and solved the issue might wanna try that and see if it helps

 

[03' White Snake]

I had the same problem. It was my pumps shutting down. I had the KB BAP hooked up after the FPDM and it was over loading the pumps. Hooked the BAP up before the FPDM and it fixed my problem. Has been fine for over 2 years now.

 

[Arod5327]

Do you have the pprv delete done? if so check your "in tank" lines. Mine would run strong to 5,200rpm's and then just hit a "wall" i took it to a shop and had same code they didn't know what it could be. I had done the pprv delete a month or so before so i dropped the tank and one of the lines had a hole in it so i replaced it and everything is good

No I don't have the pprv delete done

I had the same problem. It was my pumps shutting down. I had the KB BAP hooked up after the FPDM and it was over loading the pumps. Hooked the BAP up before the FPDM and it fixed my problem. Has been fine for over 2 years now.

I don't have the kb bap

 

[Arod5327]

I would check the spark plugs too. Could be that they are gapped wrong or that they opened (or closed) up. Has happened to me in the past. I hope you're not running platinum plugs.

What's wrong with platinum plugs??

 

[fast ford brian]

I had a bad pump do the same thing . It def sounds more like an in tank issue . I have even seen on occasion the fuel hose splitting in the tank and when you get on it it sprays into the tank instead of feeding the motor.