rwferguson
Registered User
1994 SC has been upgraded with a built bottom end. The car is very familiar on this page. My Dad recently toke the car to the shop to get some things fixed and checked. The shop replaced the sending unit in the gas tank among other things. The car ran great prior to dropping it off to the shop. When the shop tried to use the obd1/2 port they stated they weren’t getting a connection to figure out why the CEL is now on.
So here’s our problem!
The car acts like it’s a miss fire, horrible hesitation, won’t idle, and have to use starting fluid to get it to start.
when it’s running it dies if u don’t back the gas off slowly. We just changed the plugs and still no change. I noticed a vacuum line that broke and fixed it but still no change. The car doesn’t have an egr valve and is spitting out black liquid which smells like raw fuel. We also replaced the MAF thinking maybe that was an issue because when we unplugged the old MAF nothing changed. Something is horribly wrong with the poor girl and I’m visiting my dad hoping to get her up and running again. Now the plugs were coated it black build up! What I think is happening is the car has default to full rich dumping too much fuel into the engine and blowing spark out. I’ve did some poking around on the forums and may have narrowed it down to the following:
Fuel pressure regulator
O2 Sensor
ECU lost the tune
Bad ECU
Vacuum leak
Clogged IAC
so any help would be much appreciated!! We have been members for 10+ years maybe even longer tbh. I’ll post a video on YouTube so y’all can also see what’s going on. I’m hoping somebody can help pin point this problem. Thanks in advanced for any help and anything right now is much appreciated because we are completely stumped. The shop can’t even figure it out as well
So here’s our problem!
The car acts like it’s a miss fire, horrible hesitation, won’t idle, and have to use starting fluid to get it to start.
when it’s running it dies if u don’t back the gas off slowly. We just changed the plugs and still no change. I noticed a vacuum line that broke and fixed it but still no change. The car doesn’t have an egr valve and is spitting out black liquid which smells like raw fuel. We also replaced the MAF thinking maybe that was an issue because when we unplugged the old MAF nothing changed. Something is horribly wrong with the poor girl and I’m visiting my dad hoping to get her up and running again. Now the plugs were coated it black build up! What I think is happening is the car has default to full rich dumping too much fuel into the engine and blowing spark out. I’ve did some poking around on the forums and may have narrowed it down to the following:
Fuel pressure regulator
O2 Sensor
ECU lost the tune
Bad ECU
Vacuum leak
Clogged IAC
so any help would be much appreciated!! We have been members for 10+ years maybe even longer tbh. I’ll post a video on YouTube so y’all can also see what’s going on. I’m hoping somebody can help pin point this problem. Thanks in advanced for any help and anything right now is much appreciated because we are completely stumped. The shop can’t even figure it out as well