RPM surge

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Mar 8, 2010 | 06:11 PM

561Powerstroke

Thread Starter

Newbie

Joined: Jan 2010

Posts: 5

Likes: 0

From: West Palm Beach

RPM surge

When my 97 PS is in park or in gear it bounces around between 500 and 700 rpms. Sometimes it does it more when its in gear rather than in park. Any suggestions on what could be causing this?

Mar 9, 2010 | 07:45 AM

twinboys

Diesel Wrench

Joined: May 2009

Posts: 508

Likes: 17

From: Minnesota

Any modifications? How long has it done this? Start by pulling the codes.

Mar 9, 2010 | 12:34 PM

561Powerstroke

Thread Starter

Newbie

Joined: Jan 2010

Posts: 5

Likes: 0

From: West Palm Beach

It's got an intake and a straight piped exhaust not throwing any codes.

Mar 14, 2010 | 03:44 PM

IDMooseMan

Diesel Fan

Joined: Jan 2010

Posts: 68

Likes: 6

From: Nampa, ID

What's your fuel pressure at the FPR? Should be 40 - 80 PSI. If it's closer to 40 PSI, add a BB (for a BB gun, not a ball bearing) to the FPR to bring up the pressure.