Weird issue ...

RichV · Mar 12, 2014

97 GT, 5 speed, stock.

Drive the car extended miles (like say 50+), and it dies. Then it acts like it's in limp mode. Cools off, seems to be back to normal. No appearance of overheating, but it may be something that thinks it is. Only codes come in are some speed sensor code. ?!?

Stumped, dude is coming over this weekend and I'll look at it a little closer.

Thinking maybe a CTS, possibly MAF or t/b.

toyman · Mar 12, 2014

TanTop94 · Mar 12, 2014

kb1982 · Mar 13, 2014

Check your fuel pressure next time it does that. Could be a fuel pump on its way out.

SLOW95GTS · Mar 13, 2014

Ect sensor on the heater pipe?

CC'S95GT · Mar 13, 2014

What's the exact code?
I have access to "alldata pro" at work and it gives pretty good breakdown of the codes troubleshooting procedures.\

What's a CTS?

Addermk2 · Mar 13, 2014

CC'S95GT said:
What's the exact code?
I have access to "alldata pro" at work and it gives pretty good breakdown of the codes troubleshooting procedures.\

What's a CTS?

So wait, you have access to all data pro... But you don't know what a coolant temp sensor is?

Sent from my CyanMobileX Evo 4G

CC'S95GT · Mar 13, 2014

LOL. Dumb ass attack I guess. I have been diagnosed with CRS. (can't remember shit)

RichV · Mar 13, 2014

^ Coolant Temp Sensor, may be other acronyms for it. Probably same sensor that SLOW95GTS is thinking. It's behind the coolant outlet on the intake.

I'll pull the codes with my device when I see the car. Not sure if he's doing right.

There are not too many things that can cause a limp mode, that what it seems like anyway. Fuel pump can be it, I'll see if it's making any strange noises, check pressure. TFI module, possibly PIP. I'd think the ECU would be smart enough to throw a code, but OBD1 isn't exactly rocket science.

toyman · Mar 13, 2014

Addermk2 said:
So wait, you have access to all data pro... But you don't know what a coolant temp sensor is?

Sent from my CyanMobileX Evo 4G

It's called the ECT (Engine Coolant Temperature) sensor in Ford lingo.

g36 monkey · Mar 13, 2014

CTS = catera touring sedan lol ;p

I was leaning towards fuel, but interested to see after you pull codes

CC'S95GT · Mar 14, 2014

RichV said:
^ Coolant Temp Sensor, may be other acronyms for it. Probably same sensor that SLOW95GTS is thinking. It's behind the coolant outlet on the intake.

I'll pull the codes with my device when I see the car. Not sure if he's doing right.

There are not too many things that can cause a limp mode, that what it seems like anyway. Fuel pump can be it, I'll see if it's making any strange noises, check pressure. TFI module, possibly PIP. I'd think the ECU would be smart enough to throw a code, but OBD1 isn't exactly rocket science.

I don't think it's the PIP or TFI because they don't usually put the car in limp mode, but they do tend to start working after the car cools down.

RichV · Mar 14, 2014

CC'S95GT said:
I don't think it's the PIP or TFI because they don't usually put the car in limp mode, but they do tend to start working after the car cools down.

True. I'm suspect on the ECT, see if I can find a resistance chart to test it.

Win · Mar 14, 2014

I've had the same thing on a mustang and f250 before.

turned out it was a Voltage regulator.

RichV · Mar 16, 2014

Update:

So dude didn't bring his car over, it has been acting up and has been real unreliable.

Buuuutttt,

Apparently I misunderstood, it is a 97 GT (mods please move to the 4.6 zone).

He said after it cools off for about 20min, it starts up and drives just fine. It can happen on the highway or just low speed cruising. It just looses power, stumbles under throttle, eventually dies. Then it does not restart for about 20min.

It almost sounds like vapor lock. It has a few mods, 3:73 gears, SCT BAMA tuner (not sure what tune he is running), BBK catted h-pipe and Magnaflow cat back, stock NPI.