night and day difference in the car with the tune and without. I have not dyno'd it before or after, but the butt dyno says big difference. No way I would want to drive the car with the stock tune in it now. shifts are incredible too. different car.
crown vic intermittent shut down
- Thread starter SnakeBit!
- Start date
07GtS197
Well-Known Member
Thanks. I had a 5 star tune on my last p71 and didn’t like it. They tuned it to where any time you gave it some gas or even when the ac compressor engages, the torque converter would unlock. Otherwise it didn’t really feel any faster. On this car I have a 75mm throttle body that doesn’t play well with the ecu sometimes so I need a tune anyway.
so new TB with new sensors installed (aftermarket) and all was good for awhile. one plus is the cold start idle works better, reduces as it warms up and at regular idle, is where it should be rather a bit high like it's been since I owned the car. however, the other day, died again. I thought I had it. A deep scan right after I replaced the TB showed a history of P2015..forced engine shutdown. Yeah, sounds like the problem.
So I thought I got it. but it did it again so next I am trying replacing just the TPS with a ford part since who knows what the aftermarket TB has on it. so the saga continues.
So I thought I got it. but it did it again so next I am trying replacing just the TPS with a ford part since who knows what the aftermarket TB has on it. so the saga continues.
An FYI for people with the 2V's..... apparently there are now three different TPS's: "Gen 1, 2 and 3. they all fit but Gen 1 & 2 have a lot of problems. they all three look different and all three fit. the latest is bigger and is basically a big box shape. the other two are shaped differently not only from the Gen 3 but from each other. none look the same from each generation. and the TPS on the aftermarket TB i got looks like the Gen 3 but for the price I paid, it is highly doubtful it's a Ford part. now others are making the Gen 3 looking TPS but the quality is not the same.
Good info to know!
Sadly, everything made these days are subpar products
Sadly, everything made these days are subpar products
07GtS197
Well-Known Member
When I can, I snag little things like this when I make junkyard runs. An old oem sensor is a lot of times better than a new aftermarket one.
so I ordered and received the ford TPS and it would not fit the aftermarket throttle body that had what looks like a Gen 3 sensor on it but the guts are different so it would not fit. of course....aftermarket part. so now my ford complete TB is on it's way. should have known better and done this from the start. hopefully, this fixes it.
new, all ford parts, TB and sensors installed. now I will see. unfortunately, since most of the time it doesn't throw a code, the only way to test it is to drive it and see if it shuts off again. there is no prior warning or indication. doesn't matter speed, distance traveled or any particular driving habit. annoying and dangerous.
07GtS197
Well-Known Member
Just throwing this out there but I’d be suspicious of the app (accelerator pedal position sensor), throttle body motor or the ecu being faulty.
Thanks, I have been considering those two as well. if the new ford TB doesn't cure it, those will be next to check. from what I have read, usually the pedal sensor doesn't do what the car is doing but rather affects acceleration by having pauses. not as responsive, etc. I would think if its in the ecu, it would be less random and more frequent.
Does the engine alone just take a dump or does all the accessory's as well?
Just throwing this out there but my sons old F250 was doing this and I once owned a 95 crown vic that did this too. Turned out to be the ignition switch module. I know the parts arent the same with your newer car compared to the old cars, but im just saying it could be a key switch module apparatus thing a ma bob
Just throwing this out there but my sons old F250 was doing this and I once owned a 95 crown vic that did this too. Turned out to be the ignition switch module. I know the parts arent the same with your newer car compared to the old cars, but im just saying it could be a key switch module apparatus thing a ma bob
07GtS197
Well-Known Member
All the sensors associated with the throttle body and accelerator pedal can cause it to go into limp mode like you’re experiencing, not just the throttle body.
when this first started I had read about that. I actually purchased a new switch, but have yet to install it. I would think, based on how it acts that it isn't that since after it has the forced engine shutdown, it cranks but doesn't start until I do it twice. also, messing with the key in the ignition doesn't create the issue. Thanks for the reminder though!!!! It could still be it I guess.
only thing is, it isn't limp mode........it shuts off completely. typically, when the pedal position sensor is going bad, it give symptoms that are different. hesitations, failure to accelerate properly, etc. Not saying it isn't it, just not showing that as of yet. Thanks!!!!!!!!
07GtS197
Well-Known Member
True but by that code it’s somewhere in that system. You’ve eliminated the tps so the only remaining things it could be are what I said in my last post.
I'll have to wait and see if the new Ford TB and TPS/Acutator did it. only way to find out is to drive and see since I just installed that. I have driven it a couple of times and so far. ok. but then that is what it always does and sometimes for months before it shows again. That's what is frustrating too besides driving along and dying!!!!!Thanks again!!!!!
just for grins, in the event that a ground is an issue, I installed on the negative side of the battery, to the existing post clamp, a 4AWG ground copper cable, short in length, heavier than anything else in the car for a ground. it is definitely grounded now!!!! otherwise, have driven it some more with no issues, however, i say that with baited breath. It's been as long as three months before it did it again.
