You are here:
- Home
- Autos
- Auto Repair
- American Motors
- Pacer Problem
American Motors/Pacer Problem
Advertisement
Question
I have a 1975 Pacer with a 4.2 258 I6. Recently the car has been bucking at low RPM. Recently all the vacuum hoses were replaced. I just had a bunch of work done to it to hopefully end this problem but even after I had new spark plugs, wires, cap and rotor, EGR valve, exhaust back pressure sensor, exhaust manifold, and the carb rebuilt it is still continuing to buck. The only other thing I think it could be would be a failing ignition coil. Am I on the right track or is there something that I'm missing? Also the fuel pump and fuel filter were replaced about 3000 miles before this problem came about so I don't think it's fuel related.
A weak ignition coil will usually show bad when under load, as during hard acceleration.
The most common cause of your condition is carburetion. It is important to properly make ALL the adjustments on the carburetor. i.e float level, metering rod adjustment, acceleration pump, etc.
How does it run at highway speeds? Does engine temperature or vehicle speed make a difference?
Related Articles
Kevin Pilotte
Expertise
I can answer many technical questions relating to AMC vehicles prior to 1979. I also have experience with Rambler & Nash vehicles.
Experience
I am a former AMC technician, service writer and service manager. I have worked in AMC dealers in Illinois in the 70's. After college, I was a Field Service Rep for American Motors Sales Corporation, working out of the Chicago Zone office. I traveled to AMC dealers assisting in the diagnosis and repair of AMC vehicles. I was also the Area Training Manager for DeLorean Motor Company. I have 10+ years as an Automotive Instructor. I have modified and restored
numerous AMC vehicles. I have been working on AMC vehicles for over 30 years.
Organizations
I have been an ASE Certified Master Technician since 1975. This includes L1. I am also currently a Toyota Certified Master Diagnostic Technician.
Publications
I have articles in "American Motoring", the official publication of the American Motors Owners Association. They are the largest AMC club in the world.
Education/Credentials
I have a certificate I printed out from a website.
©2012 About.com, a part of The New York Times Company. All rights reserved.