How to get the truck to go faster than 65 mph

Asked by myyoung Oct 24, 2015 at 12:40 PM about the 1990 Dodge RAM 50 Pickup LB 4WD

Question type: Maintenance & Repair

I have a 1990 dodge ram 50 4x4 2.4L truck and it moves slow from a dead stop and it will not go faster than 65-70 mph. Does anyone know how to fix the problem?

5 Answers
70,075

Kelly answered 8 years ago

hummm..a timing isue????? or not....first change the fuel filter........

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myyoung answered 8 years ago

Thanks, but I've done that. I had the transmission and engine rebuilt. I put a new torque converter on it the other day. I put a new exhaust on it three years ago. New MAF a couple months ago. I checked the fuel injectors and they are good.

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60

smckie answered 8 years ago

Hello... your secondary CAT on the exhaust manifold could be clogged... its a major flow restriction and power robber if it is.. :)

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myyoung answered 8 years ago

Thanks, but I have disconnected my exhaust system and driven my truck and it did not make a difference.

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GuruTGNBC answered 5 years ago

If the truck bucks at around 40 MPH as the diaphragm in the secondary actuary fails. There are some tricks to get around this problem. I added set screws to hold it open. That worked nicely. To replace cost over $100. Oh you have to remove the carb to get to this park.

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