Thinkreferrals
Registered User
Over the last couple months my 1990 SC would once every couple or three weeks run really rough after starting when fully warm and parked for a very short time and would then clear up after shutting off, leaving for a few minutes and starting again. Then about 5 days ago there was a ticking sound, kind of like lifters but would be louder sometimes and quieter sometimes. Yesterday I started the car and I was driving out of a parking lot and it started to run really rough with screeching type noises like something rubbing or scraping then it died and would only fire up but not stay running. I left it parked for several hours and tried starting and the screeching noise was there and it would not stay running so I had it towed home. This evening the car started with only the ticking getting louder and quieter but it idled smoothly, I did not attempt to drive because obviously there is a serious issue and I don't want to do more damage.
I have had a Harmonic Balancer bolt shear off so I checked that and also checked for wobble, there was none. Things I have done in the years I have had the car include the balancer along with timing gears and all related items including water pump, I have had blown Head Gaskets which I replaced with Multi layer gaskets, lifters, pushrods, seals and motor mounts were all replaced at that time. Donor AOD is in it till I have time to install the 5 speed I bought from jludorf. Other than that the car has been awesome for a lot of years.
I am thinking something like cam or crank sensor but reading the posts about those don't seem to be the same symptoms. Stumped.
I have had a Harmonic Balancer bolt shear off so I checked that and also checked for wobble, there was none. Things I have done in the years I have had the car include the balancer along with timing gears and all related items including water pump, I have had blown Head Gaskets which I replaced with Multi layer gaskets, lifters, pushrods, seals and motor mounts were all replaced at that time. Donor AOD is in it till I have time to install the 5 speed I bought from jludorf. Other than that the car has been awesome for a lot of years.
I am thinking something like cam or crank sensor but reading the posts about those don't seem to be the same symptoms. Stumped.