Need Help 94 5.0

venrick1991 · Oct 11, 2015

There's a hall affect sensor under the rotor in the distributor make sure it isn't bad or drawing moisture,spray it down allover the rotor inside the cap and down in it all I over the hall affect sensor

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Jacob302 · Oct 11, 2015

What do I spray it with? I replaced all the vacuum lines,I've replaced almost every sensor,still no check engine light but it still studders and surges,sounds good at idle,but once u start moving it sounds horrible.....tomorrow I'm testing the fuel pressure and cylinder compression....im not sure where else to go from there

Jacob302 · Oct 11, 2015

And yes I know,everyone swears it's cuz I have no o2 sensors,but it drove perfectly fine for 3 years with no o2 sensors......i honestly have no clue......someone told me i could've twisted my distribution shaft,I've never heard of that before,is that even possible?

Boosted92LX · Oct 11, 2015

Jacob302 said:
And yes I know,everyone swears it's cuz I have no o2 sensors,but it drove perfectly fine for 3 years with no o2 sensors......i honestly have no clue......someone told me i could've twisted my distribution shaft,I've never heard of that before,is that even possible?

Bud, you've already gotten the best advice available, but you refuse to listen to it... why?

These guys on this forum know these cars inside and out, and you are claiming your local mechanic is a hack and your car runs just fine with no o2 sensors. The only "distribution" shaft that can twist off is between your distributor and oil pump. If it twists, your oil pump is locked up... thevcar will still run, you just won't have oil pressure.

Do yourself a huge favor and look into the suggestions offered to you already. It's pointless to ask for help, and then not take the advice. Start with the checklist.

Jacob302 · Oct 11, 2015

Yea yea,o2 sensors.....hasn't been an issue in over 3 years,I seriously doubt it'd be a cause for this now,but sure ok

RaggedGT · Oct 11, 2015

Are O2 sensors the only thing on the checklist ? Lol
I'd still be curious to know if it had a tune chip in it- I would bet it has some kind of chip/tunner or piggy back style ecu on it. Chips can loose a tune and some piggy back system like the quarter horse have a internal battery. No clue if that's your problem but with your list of new parts I wouldn't rule it out.

Jacob302 · Oct 11, 2015

Thank you,greatly appreciated...not sure exactly what to look for but now I have somethin to research

stykthyn · Oct 12, 2015

Jacob302 said:
Yea yea,o2 sensors.....hasn't been an issue in over 3 years,I seriously doubt it'd be a cause for this now,but sure ok

Sounds like you've got a good handle on this. Best of luck getting everything straight.

Jacob302 · Oct 12, 2015

Now that someone has pointed me in the right direction instead of being hung up on o2 sensors I'll get it , I've driven that car state to state for over 3 years with no problems,I've even raced it a few times and it ran perfect,it has always run perfect,don't be upset cuz ur solution doesn't make sense

stykthyn · Oct 12, 2015

You were asked earlier about the ecu and you said you didn't know. You come in here wanting someone to bust out a magic wand and tell you exactly what your issue was. Much more knowledgeable people than myself gave excellent starting points.

hoopty5.0 · Oct 12, 2015

Surprised nobody has offered up the ol' flush with water and sand trick. It's like sea foam, but the abrasiveness of the sand really gets in the crevices then the water flushes out whatever is gumming up your engine.

Jacob302 · Oct 12, 2015

Yes,and I don't know anything about mod chips,so now I know to look for a battery in a piggy back, all my sensors,n vacuum lines are good,I still have no check engine light,and yes I've know it can have codes without a light,but there are still no codes.i did go thru the check list,i did follow advice. I just know it's not the o2 sensors, doesn't matter which state I was in,or what gas i put in, the o2 sensors have never once been an issue

a91what · Oct 12, 2015

I do hope you understand that the o2 sensors tell the ecu exactly what the afr is. If the car is chipped to tune them out then fine they are no problem. If you pull the codes and the o2 sensor code shows up, we'll then maybe you should heed the advice given to you and fix the thing right.

O2 sensor gone bad= runs like

Not taking good advice from people who are certified with year of experience on these cars is ludicrous.

We don't just spout nonsense here. Fix the o2 sensors and enjoy no more problems if they were tuned out there would be no code for them.

Jacob302 · Oct 12, 2015

I do understand that,but why after driving it daily for over 3 years would that now be a problem?I have no codes,not even for the o2 sensors. It's never studders or stalled,always ran perfect.

a91what · Oct 12, 2015

To check and see if the ecu has been chipped.
Remove passenger side kick panel, the ecu will be in the area strapped to the body of the car.

Once you have it removed on the backside of the ecu there is an opening if it's empty no chip if there looks to be an extra device then rake some pictures and post em up so we can help you out.

Actually take some pics anyway so we can see what is up with the car.

hoopty5.0 · Oct 12, 2015

If they weren't necessary, Ford wouldn't have wasted money installing them. Period.

Jacob302 · Oct 12, 2015

Thank you,I'll do that tonight after I get home from work

Jacob302 · Oct 12, 2015

And if they were the problem it wouldn't have been driving perfectly for three years with with no codes

Jacob302 · Oct 12, 2015

If u can explain why it ran perfect for so long without o2 sensors,and then say that's the reason,then I'd understand. Explain how it could run perfect for so long and this to now be a problem n I'll be a open minded about it, but if it was the o2 sensors I would've had problems before now

hoopty5.0 · Oct 12, 2015

I really can't. My car had bad 02 sensors when I bought it, and it ran awful. Sputtered, back fired, idled horrible.

The computer uses them to determine the correct fuel mixture. The fact that you are saying that it ran 'so well' for 3 years without them is about as believable as the moon being made of green cheese. If you can find proof of another EFI car that runs great without O2 sensors, I'd be very interested to learn more.

Need Help 94 5.0

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