09-30-2011, 08:06 PM #1
Maiden voyage after rebuild didn't go very well
Took the 04 RXP out today for the first time after the rebuild. Idles fine with no codes. After acceleration the check engine light comes on after throttle is applied. There are no codes stored. I didn't make it more than 50 yards but decided to trailer it versus taking any risk. The only other thing that happened that was out of the ordinary was a single "dull pop" from the engine compartment when I first accelerated. It did not repeat as I came back to the dock. It sounded like a dull backfire without repeat. Oil at normal level with no signs of water. Coolant is at normal level with no unusual issues. All hoses still in place with no issues. Check engine clears at low rpm and does not come on until rpms increases.
Any ideas? What should I check next? I'm really bummed after a 2 year rebuild (I'm slow).
09-30-2011, 08:07 PM #2
09-30-2011, 08:22 PM #3
1 - 135, 2 - 135, 3 - 150. Just remember that there is no way the rings are set. I quit way too soon.
Btw - charger is working fine. What can cause check engine without codes?
Btw - I accidentally put 10 gals of normal octane and later added 5 gallons of premium. But no knock sensor codes. Knock sensor harness in place.
09-30-2011, 08:43 PM #4
09-30-2011, 08:46 PM #5
Well it appeared to be on the money, but i guess that is possible. Wouldn't it run poorly over the entire rpm range?
Just to be clear, it runs/idles fine. Not rough at all.
09-30-2011, 08:54 PM #6
- Join Date
- Dec 2006
- Crest Hill, IL
Did it go into limp mode? Check your oil pressure sensor and green temp sensor on the front of the motor...You might have the lines crossed...I did that years ago when I swapped a motor to a new hull...The oil sensor has the one with 1 cable, since the block is ground...Just a thought...
09-30-2011, 09:00 PM #7
I don't think so, but to be honest I did not push it at all. I did check all of the electrical wire colors on the engine front that could be interchanged.
10-01-2011, 02:13 AM #8
Hi could you possibly have an intercooler
Leak I had same problem
Would run fine at low revs but still a bit rubbish on
But when you open it up the check engine comes up
But no codes
Take the intercooler out and pressure test it
The last thing you want is water going into the head
And corroding your valves
You still might not find any water in your oil just yet
I ran mine for 3days till I figured out the problem
10-01-2011, 06:25 AM #9
I did a complete pressure test on the intercooler before installation. It has maybe 10 minutes run time at the most, but I guess it is still possible. Danny, I checked that very carefully because those plugs can be interchanged. I also wouldn't think that would be throttle dependant. Any other ideas guys?
10-01-2011, 06:28 AM #10
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