Fuel 1993 super rich need help (FIXED)

Mstng93SSP · Nov 27, 2018

My 93 coupe 5.0 was running ok, but had recently developed an occasional stall, but would start back up and run fine. I started the car yesterday, and bluish smoke came out the exhaust, and the car surged like crazy. I shut it down and pulled the plugs. They are all fouled and smell like raw fuel.

My car is stock bottom end, AFR heads, GT 40 tubular intake, Anderson Ford cam, 24 lb injectors with correct C&L MAF.

I have the plugs out and upper intake off so I can't run KOER codes. I am thinking it's not a bad injector because all plugs are fouled, so maybe fuel pressure regulator or bad MAF (which was new 6 months ago and looks clean??)

When it stalled, I had to hold the gas to the floor (to shut off the injectors) to get it to start again.

Any thoughts on this?

Thanks, Chris

RaggedGT · Nov 27, 2018

Can you measure fuel pressure?

Mstng93SSP · Nov 27, 2018

I can try to with a gauge I have but only key on pressure, not running pressure.

General karthief · Nov 27, 2018

Ok, let me get this straight, you yanked the intake because the plugs were wet and you had trouble starting it?

Mstng93SSP · Nov 27, 2018

Noooo, .....well not exactly. I yanked the upper intake to swap the fuel pressure regulator because I suspect this is the issue.

General karthief · Nov 27, 2018

Oohhh!
carry on!

96pushrod · Nov 27, 2018

Saw a fox that threw a code for a bad baro sensor that caused it to run pig rich.

General karthief · Nov 27, 2018

Could also be a weak spark

General karthief · Nov 27, 2018

Or low tire pressure
what do I know, after all I do have a idiot light!

Mstng93SSP · Nov 27, 2018

My spark isn't as strong as it used to be......

General karthief · Nov 27, 2018

Yea, I know the feeling but I'm older.
now back to the car problem.

JD1964 · Nov 27, 2018

Make sure the o2 sensor wiring is intact and nothing got disconnected. Or maybe a bad o2 sensor itself.

Mstng93SSP · Nov 27, 2018

OK, will check.

Mstng93SSP · Nov 28, 2018

It's all back together. Still same issue. When I scan codes KOEO I get code 54 and 67. I can't get it to read with engine running.

General karthief · Nov 28, 2018

You have to fix the code 67 before it will go into koer mode. You did have the trans in neutral and the clutch depressed?

54

Intake Air Temperature (IAT) or Vane Air Temperature (VAT) signal high – IAT VAT

Mstng93SSP · Nov 28, 2018

It's an automatic.

General karthief · Nov 28, 2018

Auto trans require that you are in neutral, I think, well almost sure, @jrichker can confirm

Mstng93SSP · Nov 28, 2018

I tried that, still got a 67

General karthief · Nov 28, 2018

The NSS code 67 can be bypassed for testing. You will need to temporarily ground computer pin 30 to the chassis. Computer pin 30 uses a Lt blue/yellow wire. Remove the passenger side kick panel and then remove the plastic cover from the computer wiring connector. Use a safety pin to probe the connector from the rear and jumper the safety pin to the ground near the computer.
copied this from one of jrichker's post, just don't drive the car with the pin grounded.

Mstng93SSP · Nov 28, 2018

OK, thanks.

Fuel 1993 super rich need help (FIXED)

You have a nice rear end there Dave.

Been here over a DECADE and still no CT

You have a nice rear end there Dave.

wonder how much it would cost to ship you a pair

You have a nice rear end there Dave.

wonder how much it would cost to ship you a pair

I think they're a little easier to get off

wonder how much it would cost to ship you a pair

wonder how much it would cost to ship you a pair

You have a nice rear end there Dave.

wonder how much it would cost to ship you a pair

there is enough sticking out to grab on to

You have a nice rear end there Dave.

You have a nice rear end there Dave.

wonder how much it would cost to ship you a pair

You have a nice rear end there Dave.

wonder how much it would cost to ship you a pair

You have a nice rear end there Dave.

wonder how much it would cost to ship you a pair

You have a nice rear end there Dave.

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