im having trouble with my 94 mark 8 it started cutting out i checked the fuel pressure and it was showing where it should be, next i did the jumper wire for code test only codes showed it was running lean changed o2 sensor still cutting out, did a cylinder balance test and it showed that 3,4,5, and 7 where not firing right changed coil pack still no change, could it be the injectors or something worse
miss fire
- Thread starter bigjoe80
- Start date
NoLimit95
Dedicated LVC Member
Why are you avoiding the spark plugs?
cause i changed them when i got the car, put a set of 19 pound injectors i had from my ol truck runs fine but the mass air has to be unpluged, so going to order a new set of ford racing 24 pound injectors and a new mass air for it
Roadboss
Dedicated LVC Member
Did you replace the spark plug wires, might want to order some FRP ones.
thaywood
Dedicated LVC Member
Wait till it gets dark, start car, open hood, look for Christmas lights
97MarkJA
Dedicated LVC Member
if it runs fine with 19lb injectors than I would gues injectors, I wouldnt run it long like that as it will be lean.
I would still double check your fuel pressure.
I would still double check your fuel pressure.
NoLimit95
Dedicated LVC Member
+1 and the current mass air flow should be more than fine for the new injectors. Unless you're going all out and for major horse power, you'll get the best performance with the current air box and paper filter. You can remove the silencer that's inside the passenger fender and take the intake tube and shave off the silencers on it also. You can use an epoxy with a hardener or JB Weld works too for filling in the holes on the tube. Sand smooth and then you'll have yourself a cold air intake, without all the heat.
Not all of us but most use Autolite 764 copper spark plugs for the best performance.
NoLimit95
Dedicated LVC Member
Wait till it gets dark, start car, open hood, look for Christmas lights
No, lol, start car, set inside with the windows up in the garage but make sure the door is open and wait for this.
The firewall really does it's job. I can vouch for that from personal experience. That was not a good night but not one burn on me. Only a small cut on the leg from diving out of the garage onto the driveway and landing in the garage door glass.
Why did this happen? All because of an O-ring on an injector that I had changed.thanks for the advice the mass air voltage is out of range why im changing that, i did put a set of frp wires on it, i have ngk tr55 g power plugs now not really happy with them so probably going to put some autolite 103 plugs in as im going to put a 75 shot on it, when i get this all fixed