Picked up a 89 Merc Grand Marquis today for $200 bucks! Straight body, good tires, good but dirty interior, and a known overheating problem.
After getting it home, I decided to check out my new toy. Filled it with water and noted that it would overheat without the thermostat ever opening. Duh! Some idiot put the thermostat in backwards I drove the car about 15 miles this evening and it runs and drives like a large luxury car should. Hmmmm..... tax time, looks like I might make a few $$$$$ on this one
It does have one slight issue though, it has a stumble just off idle and a check engine light. I haven't gotten to checking this out yet, but any suggestions are appreciated.
I have the exact same car. I found mine out of Florida with no rust or damage.
I paid $600 for mine and it was a steal. Low miles, no rust, doesnt use oil, clean and only has a few old age problems. Back windows dont work, needs shocks. I bought it and drove 200 miles she cruises like a yatch.
Its my daily driver but if another project come salong I would consider parting it for the wole drive train.
nice find! Try running codes on it to see if a sensor is going bad. Or the cat, if original, may be plugged enough to cause issues that will warrant a light to come on also. Spray some cleaner on the EGR and that may help, too. Typical EFI stuff, lol. 5.0 I had in an '87 Cougar had the EGR pipe rusted thru which caused the same problem, and my '88 Tbird had both cats plugged enough to cause a stumble. Can't beat the price though. I s'pose you'll be buying a 67-72 F100 and do the body swap, eh?