extreme rail hang

[bradley59dzl]

Stock truck. 99k on the clock, Injectors ck'd. Swapped Fca's. It hangs extremely bad and also has issues when you come to a stop. If you unplug map sensor it acts like a normal truck? Anyone point me in the right direction? Thanks

 

[joefarmer]

Ground shorted to the rail pressure sensor? The 5v/ground is shared between the MAP, IAT and rail sensor in the harness. Put it on a scanner and see what the rail pressure is reporting at idle.

 

[bradley59dzl]

I will ck when I re install injectors. I ck'd them a second time to be sure. I do believe rail pressure readings were good. I'll get them and report my findings.

 

[TX_5.9]

Uh, map sensor maybe no bueno???

 

[bradley59dzl]

Uh, map sensor maybe no bueno???

No, I verified with scanner and also swapped with a known working sensor.

 

[bradley59dzl]

Rail pressure 6,8** at idle. MAP sensor voltage at 1.3** at idle.

 

[bradley59dzl]

Any suggestions?

 

[joefarmer]

I'm lost. Short in the harness somewhere?

 

[ComnRailPwr]

Agree^^

 

[bradley59dzl]

I guess I'll break out the multi meter...

 

[joefarmer]

An example would be I worked on a harness last night. Found the 5v PK/YL insulation was sliced down by the C1 plug.