Codes changing why?

Surges under load but only while going uphill Page1 - Chevy High ...

forums.superchevy.com > ... > General Chevy Technical Discussion

Mar 6, 2011 - 14 posts - ‎8 authors
Trying to help out a friend. ... The truck starts, runs, and drives fine until you get to a hill. When going up hill it begins to surge, almost stalling but not quite. ... rubber fuel lines suck shut under a heavy load and act like that. .... tranny fluid level o.k.? ya got me stumped. runs great when it's on a flat surface?

Ford 460 engine - RV mechanic

www.rvmechanic.com > Discussion Forum > Mechanic's Corner - Engines

Will not take gas going up a hill but will maintain speed at 55 mph. ... Want to do a diagnostic test on my 1997 F250 with 460 engine. ... only get to about 40 miles an hour if i push it the engine acts like its running out of gas,thank you .... The truck hesitates on acceleration, while driving on flat surface is fine, however climbing ...

rough idle, stalling, loss of power. - CarGurus

Start by replacing the air filter and checking the operation of the fuel pressure regulator. Have the stored codes read out of your ECU, either by an auto parts store or a local mechanic, in order to ascertain a starting point for diagnosis.

Are you sure the spark plug wires are on the correct spark plug? Recheck the firing order and spark plug wires. Additionally check timing on distrubutor

You sure filter is facing flow correctly?:I'd check that first,some cars/trucks have in-line filters.

Check the battery cables. I had the same issues with my 96 tacoma, The battery cable connection at the battery can be cranked down but still be loose. Hard to explain, doesn't make sense, but just check it out.

Check the primary and secondary resistance on your coil, also check the resistance of the plug wires and verify the spark plug gap.

Check that the electrical connectors in the Distributor are a tight fit, battery connections are secure and that the low voltage connectors to the Ignition Coil are tight as well. Spark plug gaps may be incorrect. There may be a vacuum leak at the throttle body, inlet manifold or associated hoses.

4.2 ltr missing. 2000 truck, f150. Changed plugs, wires. Ran great for 2 weeks. Started again. Changed coils. Got worse. Changed fuel filter, did nothing. Added injector cleaner and fuel cleaner, nothing. Checked EGR, o.k. It is getting worse. Had new gas about the time it all started.

I know the 4wd lights flash a code and I have replaced a transfer case control module on one before but as for the clunk and engine dying maybe it is a combination of more than one problem

I replaced the converter because it had fallen apart internally and was making noise.