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p0507 but no noticable problem

Nick Perez

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Nick Perez New Member

Nick Perez

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Hey everyone I have a 1999 GMC Suburban 1500 with a 5.7 2wd It has about 154,000 miles. I recently got a p0507 code and ignored it because I couldn't trace the problem and it didn't seem to be affecting the truck at all. I am now about to go to emissions and I cant because I cannot figure out this code. I checked for leaks and found none. There seems to be nothing wrong yet I am still getting this code very shortly after driving. Could this be a lower intake leak? or would i notice some sort of problem if it were an intake gasket leak?

Nick Perez New Member

Nick Perez

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Thanks I just ordered a manual on eBay. Anyone have the page they can send for trouble shooting the p0507 DTC? Driving on temp tags that are about to run out. I replaced the IAC and took iy out for a spin and the p0507pp showed on the scanner quickly. I was going to replace the intake gasket just for shits but something tells me shot gunning it is j st going to cost more than help.

oldscsc Enthusiast

oldscsc

Posted
Posted

You'll get more replys if you post the code meaning. Most of us don't have all the codes memorized.

 

Just did a quick Google search and came up with "idle speed too high". The PCM sets this code when it commands the engine to idle at x RPM, but the actual measured RPM is higher.

 

What is the truck idling at full operating temp in gear?

oldscsc Enthusiast

oldscsc

Posted
Posted

These pickups should idle around 500RPM if I recall correctly, so that explains the code. Did this start after you completed any work on the pickup?

 

How did you check for vacuum leaks?

Nick Perez New Member

Nick Perez

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No I hadn't done any work it until after the code came up. I cleaned the throttle. Body and replaced the iac. I checked for leaks visually and than sprayed starting fluid all over to see if there was any change. I tried plugging the valve cover pcv and breather holes to see if vacuum was being pulled in through the dip stick but the dip stick tube comes out pretty freely so I couldn't tell if there was a good enough of a seal on it to take in air from the top of the tube.

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