Fuel problem?
#1
Teching In
Thread Starter
Join Date: Sep 2007
Location: Leroy, new York
Posts: 17
Likes: 0
Received 0 Likes
on
0 Posts
Fuel problem?
O.K. guys. My fuel pressure starts at 60lbs and at about 4600rpm, it starts going down, to about 56lbs at 5600rpm. My ? is this, does anyone else have this problem? Remember my truck does not have a return line (2004 and newer). Westers is saying this is the reason I am getting pinging at 4600rpm and higher. I also have the walbro 340 pump and it helped because it was starting at 58lbs and going down to 49lbs before I put the walbro in. This is driving me crazy.
thanks for any ideas
thanks for any ideas
#2
12 Second Truck Club
iTrader: (7)
Join Date: Jun 2006
Location: colorado above 6000 ft.
Posts: 2,093
Likes: 0
Received 0 Likes
on
0 Posts
sorry for thread jacking but Im kind of having the same issue with mine. Although I havent checked fuel pressure yet. Ive noticed on the WB that its going lean higher in the rpm I go and start getting som det. a/f goes from like 11.2 and leans out to 12.2 - 12.4 before it shifts. Never had this problem before I think the pump is getting weak. Im installing a hot wire kit and walbro 360 inline pump, hopfully it solves the issue. Also noticed yesterday truck died a couple of times at start up and was idiling kind of choppy. drove it around the block and was woring better.
#3
TECH Addict
iTrader: (7)
Originally Posted by bignred
O.K. guys. My fuel pressure starts at 60lbs and at about 4600rpm, it starts going down, to about 56lbs at 5600rpm. My ? is this, does anyone else have this problem? Remember my truck does not have a return line (2004 and newer). Westers is saying this is the reason I am getting pinging at 4600rpm and higher. I also have the walbro 340 pump and it helped because it was starting at 58lbs and going down to 49lbs before I put the walbro in. This is driving me crazy.
thanks for any ideas
thanks for any ideas
#4
TECH Addict
iTrader: (7)
Originally Posted by WJ MARK
sorry for thread jacking but Im kind of having the same issue with mine. Although I havent checked fuel pressure yet. Ive noticed on the WB that its going lean higher in the rpm I go and start getting som det. a/f goes from like 11.2 and leans out to 12.2 - 12.4 before it shifts. Never had this problem before I think the pump is getting weak. Im installing a hot wire kit and walbro 360 inline pump, hopfully it solves the issue. Also noticed yesterday truck died a couple of times at start up and was idiling kind of choppy. drove it around the block and was woring better.
#6
Originally Posted by bignred
O.K. guys. My fuel pressure starts at 60lbs and at about 4600rpm, it starts going down, to about 56lbs at 5600rpm. My ? is this, does anyone else have this problem? Remember my truck does not have a return line (2004 and newer). Westers is saying this is the reason I am getting pinging at 4600rpm and higher. I also have the walbro 340 pump and it helped because it was starting at 58lbs and going down to 49lbs before I put the walbro in. This is driving me crazy.
thanks for any ideas
thanks for any ideas
#7
12 Second Truck Club
iTrader: (7)
Join Date: Jun 2006
Location: colorado above 6000 ft.
Posts: 2,093
Likes: 0
Received 0 Likes
on
0 Posts
Ok check fuel pressure. idle is about 54 psi. stab the throttle, pressure spikes to over 60 and falls back to 55 under WOT. Does this sound like pump is not keeping up?
Trending Topics
#8
Teching In
Thread Starter
Join Date: Sep 2007
Location: Leroy, new York
Posts: 17
Likes: 0
Received 0 Likes
on
0 Posts
WJ MARK, You have a return style system, correct? I'm trying to find out about the returnless system. Anyone else have this problem with a 04 or newer?