Hard start and won't rev past 3500

[bluekon]

Initial turning the key to on fuel pressure 35 psi
Cranking while trying to start about. 55 psi
And running at idle @60psi

 

[JenneK]

Key On/Engine Off pressure sounds really low. Should be around 60-66psi, IIRC.

 

[bluekon]

Yea I thought like 55 do that explains the hard star unfortunately couldn't drive it with the gauge in it to see what it did at 3500

 

[Phone Man]

Change the fuel filter first.

 

[bluekon]

Replaced air and fuel filters today no change in either problem took the intake tube off to get a better look at things... Opened the throttle body butterfly to find this not sure if it's normal or not

 

[JenneK]

What the carbon and crap? Yeah...thank the EGR valve for that.

 

[bluekon]

Yeah the carbon crap

 

[BattelWagun]

Yeah all that carbon is normal unfortunately. You can thank US emissions standards for that... As for the 3500 rpm issue; yes, the pre ignition fuel pressure seems quite low IIRC. Even though it idles fine and runs properly at a round 60 psi at idle, the pump may not be able to keep up with the fuel consumption rate at higher rpm's, and starts to lose pressure, causing the engine to sort of "hit a wall". You could try to replace the pump and sending unit to see if it fixes the issue, but I would try to get that code sorted out first.

 

[bluekon]

The code is off replaced the crank sensor and no code for about 100 miles... I'm gonna have to put the fuel gauge back on it and try it out again

 

[BattelWagun]

The code is off replaced the crank sensor and no code for about 100 miles... I'm gonna have to put the fuel gauge back on it and try it out again

Alrighty then, well that helps narrow things down a little. So you're saying in park/neutral it'll rev normally to any rpm, all the way up to redline. And in gear it struggles to get past 3500?