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Ask Jerry Your Own Question
Jerry
Jerry, Master Mechanic
Category: Dodge
Satisfied Customers: 1754
Experience:  ASE Master tech, 30 years exp. troubleshooter, driveability tech
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2003 Ram 1500 4.7L 190,000 miles just replaced all coil

Customer Question

2003 Ram 1500 4.7L 190,000 miles just replaced all coil packs, fuel pump and TPS.... runs pretty good but it doesn't fel like it has it's full "balls". i noticed this when accelerating to highway speed....it reached 70 and I let off the pedal to maintain speed. when my speed decreased a little, I depressed the pedal slightly to rergain speed and the engine had a "shudder" as if not firing on all cylinders. I pressed the pedal harder to hit passing gear and it regains "strength" but when the transmission hits OD and the RPMs drop it loses its "balls" and has a sluggish feel. Now, just city driving...no issues. This seems to be something that occurs during highway conditions.
JA: Have you ever replaced the fuel pump, or is this the original?
Customer: New fuel pump
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: Are you reading my posts?
JA: No. I'm the Dodge Mechanic's Assistant.
Customer: read the post...it clearly states what I have done and what is occurring.
JA: Anything else you think the mechanic should know?
Customer: That's all that I can think of....perhaps he will have an idea and ask but I think I've given a clear picture of my problem, thank you.
Submitted: 10 months ago.
Category: Dodge
Customer: replied 10 months ago.
Also, no "engine check" light.......this began when I changed the plugs and the #7 cylinder coil pack failed.....because they were factory it was my decision to replace the entire set. Before this, never any issues and my Ram had BALLS....put your foot down and it'd go!....
Customer: replied 10 months ago.
Also, because of the new coil packs, fuel pump and TPS, I wanted the PCM to gather fresh and accurate data on engine performance so I cleared the existing data using the procedure of removing the PCM fuse. I'm sure it's nothing catastrophic but I'm all out of ideas and I need my truck running at 100% efficiency....please, help me resolve this issue.
Expert:  cloe0626 replied 10 months ago.

dose it only lose power at highway speeds

Customer: replied 10 months ago.
That is correct.....it only occurs during highway conditions.
Customer: replied 10 months ago.
in OD the RPMS drop to about 1800 @ 65.....when I depress the pedal to accelerate it becomes sluggish (like it boggs down) but as soon as the the TCM drops to passing gear the motor perks up.
Customer: replied 10 months ago.
Check Engine light just came on!!!
Expert:  cloe0626 replied 10 months ago.

do you have a code a reader

Customer: replied 10 months ago.
It reads #7 cylinder......