Dean89
Newbie
I put the UMP distributor in the link below in a brand new GM Crate motor about a year ago in my 99 tahoe. The engine ran flawlessly for 10k miles, but suddenly started having hesitation, stumbling issues. With an old MT2500 scanner I checked the Cam Retard and it was reading -12 degrees. I loosened the distributor hold down bolt, but could not rotate the distributor. It appears to me that this distributor can not be rotated as where the hold down clamp attaches to the distributor it is not round and free to rotate. I ordered a GM distributor hold down clamp, but not sure if that will make a difference. Should I order a GM remanufactured distributor instead of trying the UMP product? I'm guessing my problem is the cap and rotor already. I was surprised to see the condition of the cap that has only 10k miles on it. I ordered a UMP DCR820X, hoping it is a better cap and rotor.
Thanks!
Thanks!