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Fuel pressure cause lope @ idle??

1K views 3 replies 2 participants last post by  blizzardplowman 
#1 ·
My 01 DMAX has developed a 3/4 cam type lope at idle, Is this a fuel pressue issue and is there a TSB, truck has 47k and I just changed filter About 2 weeks ago, but the lope started today, checked if filter was tight and all appears fine.
 
#2 ·
Yes and Yes ....


There is a ECM flash that will some what correct the lop but eventually you will need a Frpcv ....


A good additive will mask the lop also ....Mine has been bad lately and I'm considering changing soon once I find a decent price on one ...





Mac
 
#3 ·
Went to dealer today, checked it out w/ Tech2. Ordered a new FUEL pump and regulator. High side was in range but low side was't even close and would not hold command pressure. Glad it's under the 100k warranty!
 
#4 ·
Got the truck back from the dealer today- Much smoother and no LOPE!
 
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