I originally got the car from my brother, (he owed me money, and I am still on the losing end of that deal!). It had sat for several years due to a blown transmission.
I overhauled the transmission three years ago. But no oil pressure. Taking apart the oil pump to pack it with vasoline I found very heavy grooves worn in the plate, which I machined flat and re-installed. Everything ran well, I was able to drive the car, so I thought "Great! Now to work on the interior."
As soon as I drop the seats off at the shop, the motor decides not to run anymore. So over the next couple of years (I am also working on remodeling the house, new kid, college at night, a Dad that insists that I work on his 87GN and his house instead of my projects!) so the diagnostic process takes a while to complete.
I kept getting plugs that shared a coil to foul (I later found out it was coincidence), even after replacing the coil pack, so figured it was the module itself. Upgraded to the module to the 87 version (84 replacement was expensive!). Still the same problem.
Close inspection showed many cracks in the headers, had them fixed.
After lots of reading I knew that it couldn't be the crank sensor, because it sort of wanted to run, so I started looking into the cam sensor as the culprit. New cam sensor and plugs (I have gone through several sets of plugs because of the fouling problem). Still no success.
Then Dad asks me "How old is that gas?" Pause from me as I think dumbly.
I then pump out about 5 gallons of very yellow varnish. Add 5 gallons of AGRI-Plus 90 (our local gas station has a pump that has a gasoline that has additives for lead replacement, detergents, stabil, anti-varnish, etc., etc., very good for older equipment or stuff that doesn't get used a lot) and new plugs, again. Now it tries to run if I feather it. Acts now like it is out of time. But I was very happy! This was an improvement over the last few years.
Removing the front cover showed the worst timing chain I ever saw. Beleive it or not, but all of the nylon was intact, but with deep grooves worn in it, as well as in the crank sprocket. The chain was so bad that when I "squeezed" it in the middle, they could darn near touch!
Timing chain installation is complete, but still doesn't want to run right (see previos postings for history of problem). I am certain that the timing chain is on right, I had my Dad and my brother double-check me. I have uploaded a saved turbo-link ECM file on my homepage at http://www.geocities.com/turbo84gn/cars/cars.html
I can get the car to run if I feather the gas at about 1400 rpm, but I get a steady backfire. If I let off the gas it will die. I'm ready to pull it next to the road and put a FREE sign on it.
Any suggestions and what to look at next?
Arthur Keene
turbo84gn@yahoo.com
84GN (all stock - maybe soon all scrap!)
I overhauled the transmission three years ago. But no oil pressure. Taking apart the oil pump to pack it with vasoline I found very heavy grooves worn in the plate, which I machined flat and re-installed. Everything ran well, I was able to drive the car, so I thought "Great! Now to work on the interior."
As soon as I drop the seats off at the shop, the motor decides not to run anymore. So over the next couple of years (I am also working on remodeling the house, new kid, college at night, a Dad that insists that I work on his 87GN and his house instead of my projects!) so the diagnostic process takes a while to complete.
I kept getting plugs that shared a coil to foul (I later found out it was coincidence), even after replacing the coil pack, so figured it was the module itself. Upgraded to the module to the 87 version (84 replacement was expensive!). Still the same problem.
Close inspection showed many cracks in the headers, had them fixed.
After lots of reading I knew that it couldn't be the crank sensor, because it sort of wanted to run, so I started looking into the cam sensor as the culprit. New cam sensor and plugs (I have gone through several sets of plugs because of the fouling problem). Still no success.
Then Dad asks me "How old is that gas?" Pause from me as I think dumbly.
I then pump out about 5 gallons of very yellow varnish. Add 5 gallons of AGRI-Plus 90 (our local gas station has a pump that has a gasoline that has additives for lead replacement, detergents, stabil, anti-varnish, etc., etc., very good for older equipment or stuff that doesn't get used a lot) and new plugs, again. Now it tries to run if I feather it. Acts now like it is out of time. But I was very happy! This was an improvement over the last few years.
Removing the front cover showed the worst timing chain I ever saw. Beleive it or not, but all of the nylon was intact, but with deep grooves worn in it, as well as in the crank sprocket. The chain was so bad that when I "squeezed" it in the middle, they could darn near touch!
Timing chain installation is complete, but still doesn't want to run right (see previos postings for history of problem). I am certain that the timing chain is on right, I had my Dad and my brother double-check me. I have uploaded a saved turbo-link ECM file on my homepage at http://www.geocities.com/turbo84gn/cars/cars.html
I can get the car to run if I feather the gas at about 1400 rpm, but I get a steady backfire. If I let off the gas it will die. I'm ready to pull it next to the road and put a FREE sign on it.
Any suggestions and what to look at next?
Arthur Keene
turbo84gn@yahoo.com
84GN (all stock - maybe soon all scrap!)
