Hello everybody,
First some background info:
I have a gulf-spec (no cats or O2 sensors) 1989 Mustang GT with a 1998 Ford Explorer 5.0 engine, the one with the GT-40P setup. Car was dead/stationary for 2 years or so because the old HO engine blew a head gasket. I decided I needed a cheap/cheerful daily driver so I finally gave in and put the hot '98 engine in last week. Problem is the car runs horribly, belching out obscene amounts of black smoke and consuming ridiculous amounts of gas. My first thoughts were that the MAF was shot, especially because the car wouldn't change when I unplugged it. Put it on the scanner and it threw out an absurd number of codes, some of which have no relevance whatsoever. No MAF codes though, even when I unplugged it... I tried several other MAFs with little to no avail. Driver side cylinders didn't seem to be firing (engine wouldn't change when I took the plug leads out). Plugs were all quite sooty so I changed them out for new ones. I discovered that 2 of the driver-side injectors were spraying poorly and the other two weren't spraying much at all so I bypassed the fuel pump and ran some injector cleaner through the injectors. Fuel pressure is a little low at 30psi even though the fuel pump was replaced not too long before the car was parked... Despite all this the car is still running AWEFULLY with no power. I'm at my wits end here, my only hope is that the computer might be somehow shot (we opened it up and it looks like it did the day it left its maker) and that replacing it will make the problems magically go away... What I don't get though is why would the computer go crazy if it was running fine before and the car was stationary since? I've got a spare A9P computer, but its a long drive away from here and I don't want to go all the way there for nothing... What do you guys think? Please advise...
First some background info:
I have a gulf-spec (no cats or O2 sensors) 1989 Mustang GT with a 1998 Ford Explorer 5.0 engine, the one with the GT-40P setup. Car was dead/stationary for 2 years or so because the old HO engine blew a head gasket. I decided I needed a cheap/cheerful daily driver so I finally gave in and put the hot '98 engine in last week. Problem is the car runs horribly, belching out obscene amounts of black smoke and consuming ridiculous amounts of gas. My first thoughts were that the MAF was shot, especially because the car wouldn't change when I unplugged it. Put it on the scanner and it threw out an absurd number of codes, some of which have no relevance whatsoever. No MAF codes though, even when I unplugged it... I tried several other MAFs with little to no avail. Driver side cylinders didn't seem to be firing (engine wouldn't change when I took the plug leads out). Plugs were all quite sooty so I changed them out for new ones. I discovered that 2 of the driver-side injectors were spraying poorly and the other two weren't spraying much at all so I bypassed the fuel pump and ran some injector cleaner through the injectors. Fuel pressure is a little low at 30psi even though the fuel pump was replaced not too long before the car was parked... Despite all this the car is still running AWEFULLY with no power. I'm at my wits end here, my only hope is that the computer might be somehow shot (we opened it up and it looks like it did the day it left its maker) and that replacing it will make the problems magically go away... What I don't get though is why would the computer go crazy if it was running fine before and the car was stationary since? I've got a spare A9P computer, but its a long drive away from here and I don't want to go all the way there for nothing... What do you guys think? Please advise...