2010 Ranger, 4 cylinder - No power.

[turbostang]

Over the past week my DD 2010 Ranger has been acting up with a sever loss of power. The wierd part is that it's not lacking power 100% of the time - it's only periodically and for 10-30 seconds at at time.

It took a solid week of driving before the CEL came on. Leading me to believe it's not electronics related, as not coils, not the ECU etc.

My first thought was bad gas or gas with water in it. I ran it that week and hoped that a fillup and some sort of additive would help it out. No luck. However it is possible that, if there's water in the tank, it might take a while to get it all out...and it does seem since fill up that 'the problem' is less frequent.

The CEL came on and when scanned it said something along the lines of 'bank one lean' - as you'd expect if the fuel pump was going bad, or if there was some sort of contaminated fuel etc.

Any other ideas, or have any of you guys experienced similar problems?

[Grape]

mine would idle funny at start up sometimes before the 36k warranty was up. you could tell it was just an IAC, the work order showed they put a new IAC on as well as a coil pack.

[turbostang]

mine would idle funny at start up sometimes before the 36k warranty was up. you could tell it was just an IAC, the work order showed they put a new IAC on as well as a coil pack.

Those were my first thoughts as well, but No CEL rules them out in this case -I think.

It's still under powertrain warranty, i'll likely call in on it and see what they say anyways.

[Grape]

mine would idle so rough it would die, and still not set a CEL. but an IAC shouldn't affect power after you are more than about 2% throttle. crank trigger losing signal for ignition pulse maybe?

[90GT50]

If you got gas at the QT at Clifford and 820, it could be bad gas, not very likely though based on what grape said.

[shumpertdavid]

Boost leak? Seriously though, does if run poorly like its missing or general loss of power evenly across the cylinders?

[turbostang]

Boost leak? Seriously though, does if run poorly like its missing or general loss of power evenly across the cylinders?

LOL, I wish.

It's not a missfire really.. more like an evenly distributed loss of power. On the freeway, when it usually happens, it will downshift (like you're pulling a heavy load) and rev to the moon without accelerating much.

It took 5 days of this before the CEL came on, and even then it was a generic code like "Bank one lean" something or other...

I did manage to call the stealership, it appears to be under drivetrain warranty if it's the fuel pump.

[Grape]

i do know the transmission mapping in the ecu or whatever controls it, was obviously done by Helen Keller. This thing is always confused and extremely notchy feeling in the fuel map above 4K rpm.

[franks]

A fuel pump wouldn't do that.

Sounds like a messed up electronic valve in the transmission or something that controls it

[CJ]

Some of those rangers and some escapes suffered from plugged cats, it's a bitch to diagnose. Now, that's probably not the issue since it's intermittent, but I have seen situations were debris was moving around in the cat, and when it killed power and exhaust flow, the debris would fall back down and it would get power again.

[shumpertdavid]

LOL, I wish.

It's not a missfire really.. more like an evenly distributed loss of power. On the freeway, when it usually happens, it will downshift (like you're pulling a heavy load) and rev to the moon without accelerating much.

It took 5 days of this before the CEL came on, and even then it was a generic code like "Bank one lean" something or other...

I did manage to call the stealership, it appears to be under drivetrain warranty if it's the fuel pump.

I assume you mean like your rolling into the throttle, have depressed the accelerator enough that you should should speed up but doesn't. It downshifts because of rhe amount of throttle angle, it doesn't accelerate because it physically lacks the power to pull itself? This is how I read it, not as frank did, he's assuming there's a transmission problem causing it.to downshift. My version could be fuel related, a mag problem, fuel filter (although a filter would likely be continuous. If it has a factory conical style filter, make sure the hard plastic cone on the end has not come loose. I have week this happen, the cone Heya turned and pulled into the paper part restricting airflow.

[shumpertdavid]

Some of those rangers and some escapes suffered from plugged cats, it's a bitch to diagnose. Now, that's probably not the issue since it's intermittent, but I have seen situations were debris was moving around in the cat, and when it killed power and exhaust flow, the debris would fall back down and it would get power again.

This is very true, usually have pretty bad rattle in the converter in my experience.

[shumpertdavid]

Excuse any typos please this is from my phone

[CJ]

This is very true, usually have pretty bad rattle in the converter in my experience.

Sometimes they do, sometimes they don't. Also, they usually do not throw codes either - one of the reason it's a bitch to diagnose.

[turbostang]

I assume you mean like your rolling into the throttle, have depressed the accelerator enough that you should should speed up but doesn't. It downshifts because of rhe amount of throttle angle, it doesn't accelerate because it physically lacks the power to pull itself? This is how I read it, not as frank did, he's assuming there's a transmission problem causing it.to downshift. My version could be fuel related, a mag problem, fuel filter (although a filter would likely be continuous. If it has a factory conical style filter, make sure the hard plastic cone on the end has not come loose. I have week this happen, the cone Heya turned and pulled into the paper part restricting airflow.

You've pretty much summed it up.

It's hard to e-diagnose, but I am certain it's not trans related. If you'd hear it, you'd see that it's clearly running bad.

I guess in a round about way, the trans could be shitting out and binding up - but it would likely make noise etc?