Boost problem HELP!!!

[cumminsboy97]

I have a 97 dodge 12 Valve.
My question is...just recently while pulling a trailer(s) up a steeper grade I only have 11psi on my boost gauge in fifth gear. That is like 40 mph. Just a total DOG. My egts never seem to get too hot either...1200ish When I go to fourth I can still hit 25 psi.(sometimes) I have notice lately too sometimes it wont be showing any boost and then just shoot up to 13 psi.
I hear it may be my injector pump(I hope not) although it starts real easy every time. I read on this forum it may have something to do with the wastegate diaphragm. If you have any thoughts I would love to hear them.
Thanks for any help.

[lance0730]

Originally Posted by cumminsboy97

I have a 97 dodge 12 Valve.
My question is...just recently while pulling a trailer(s) up a steeper grade I only have 11psi on my boost gauge in fifth gear. That is like 40 mph. Just a total DOG. My egts never seem to get too hot either...1200ish When I go to fourth I can still hit 25 psi.(sometimes) I have notice lately too sometimes it wont be showing any boost and then just shoot up to 13 psi.
I hear it may be my injector pump(I hope not) although it starts real easy every time. I read on this forum it may have something to do with the wastegate diaphragm. If you have any thoughts I would love to hear them.
Thanks for any help.

lift pump(70 bucks from cummins) could be going if its intermittent. probably have a boost leak as well if its not your LP. check your lower boots down by the wheel well.

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96 2500 GONE! New 1996 3500: Full billet DTT, pac brake, #10,timing,AFC spring kit,3GSK,5X12s,58/14 Hybrid, lockup controller,3 piece, 105,000MI

[clc]

40 MPH pulling a trailer up a hill in fifth gear? Even with a 4.10 rear end that would be lugging it. Read up on your fifth gear (while you still have one).

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96 3500 4WD, 47RE, gauges; 97 3500 4WD 47RE, gauges; 97 3500 2WD 5-spd; all club cab. 98.5 2500 2WD SB, 5-spd, gauges, quad cab

[cumminsboy97]

Originally Posted by clc

40 MPH pulling a trailer up a hill in fifth gear? Even with a 4.10 rear end that would be lugging it. Read up on your fifth gear (while you still have one).

I ment it will drop to 40mph. The motor wont keep the reg speed 55mph. I normally dont pull a trailer going 40 in fifth...:-)