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What could have caused this? #5433340 05/19/20 01:26 PM
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wtd Offline OP
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My fiancée's son owns a 2014 F150 with the 5.0L that has 196,000 miles on it that he bought new. He works for the railroad and travels for his job thus the high mileage but most of the mileage is highway miles.

This truck had been totally trouble free until about 190,000 miles when he started getting a slight tapping noise in the engine at certain rpms. He took it to an independent shop and they determined it was the cam phasers. He had Motorcraft cam phasers installed and at the same time had an aftermarket timing chain kit installed. Noise in the engine is now gone and the truck runs fine with no CEL.

So fast forward to last week and about 5,000 miles later, he is out of town for work and his truck starts running like crap and the CEL comes on and it feels like it's missing. He takes it to Autozone and they read the codes. One is a P032 and the other is a P0019. P032 is a cylinder 2 misfire and P0019 has to do with the cam position sensor on bank 2. He only has a couple of days left until he comes home so he keeps driving it.

He comes home and takes it back to the shop who did the repair and they don't know what is wrong. Someone(not the shop) had convinced him that the problem was a bad fuel injector on cylinder 2 so he had the shop install a new injector.

Of coarse that doesn't fix anything so he replaces the plugs which are the original ones and of coarse that doesn't fix the misfire. They also moved the coil pack around and the misfire is still in cylinder 2.

He has me put the truck on my scanner and it still shows the two codes I mentioned before but now had a P0018 code which had to do with the other cam position sensor on the same bank. Truck is idling very rough and you can tell it's misfiring. I tell him it's possible he has a compression problem in cylinder 2 since they have done and replaced pretty much everything for that cylinder. He makes an appointment at the local Ford dealer and they look at it and tell him he needs a new engine to the tune of about $9,600 and that he has low compression in four cylinders. He brought the truck home and said he is not spending the money to replace the engine. He had to go back out on the road for work so nothing has been done to the truck to verify if the compression is in fact bad. He took a different vehicle so his truck is just sitting.

So I have a few questions. If the dealer's diagnosis is correct, what could have caused this compression issue on what is supposedly a pretty durable engine. The entire time he has owned it, he has changed the oil using the OLM which usually tells him to change between 9-10 K miles. He always uses Motorcraft 5W-20. 98% of the miles on the truck has been long distance highway miles. Do you think that the long oil changes with the 5W20 oil could be the cause?

Could the cam position sensor issue have caused some type of damage to the engine resulting in low compression?

Could driving it with the misfire have caused the low compression in such a short time? Only cylinder 2 shows a misfire on the scanner. He didn't tell me if the dealer had told him what cylinders had the supposedly low compression.

What could be the cause of the P0018 & P0019 codes? Something in the original repair that went bad?



Thanks.


2014 Mustang GT
1998 Chevy K3500
1998 Chevy K1500
(2) 1992 Cavaliers
1970 Monte Carlo
Re: What could have caused this? [Re: wtd] #5433347 05/19/20 01:33 PM
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supton Offline
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Only the dealership ran a compression test? Did you get the numbers?

I'd think a used engine could be swapped in by an independent for much less than the dealership.

One cylinder to suddenly go low is surprising but not unheard of (chipped valve or sticky valve or the like). But to have 4 go out? I wonder if three are borderline. Any chance they are all on the same bank?


2011 Toyota Camry, base, 2.5L/6MT, 205k, hers
2010 Toyota Tundra DC, 4.6L/6AT, 159k, ours
1999 Toyota Camry LE, 2.2L/4AT, 225k, his
Re: What could have caused this? [Re: wtd] #5433351 05/19/20 01:39 PM
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Trav Offline
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The list is long so I will just provide a link. The fact it happened in 5K after a repair in that area would suggest something went afoul, possibly the aftermarket chain.
What brand did you buy for these parts?

https://www.obd-codes.com/p0019


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Re: What could have caused this? [Re: wtd] #5433352 05/19/20 01:39 PM
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Jetronic Offline
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I think its an engine timing issue, maybe a cam phaser stuck or the timing is genuinely off. Possibly related to the earlier repair. I'd definitely be checking the timing first thing.


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Re: What could have caused this? [Re: wtd] #5433355 05/19/20 01:43 PM
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mk378 Online Content
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Yes get the compression numbers or do a compression test yourself. If all the cylinders on one side have low compression and the other 4 are good, I'd suspect that cam is way out of time.

Re: What could have caused this? [Re: wtd] #5433359 05/19/20 01:46 PM
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dogememe Offline
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What if the timing on that bank is wrong? Since it's only been a few thousand miles since the timing was messed with.


2010 Ford Escape 2.5 ~104K Miles: AMSOIL Signature Series 0W-30, Wix Filter.
2001 Chevy Suburban 5.3 ~292K Miles: Valvoline Maxlife 10W-30, ACDelco Filter.
Re: What could have caused this? [Re: wtd] #5433371 05/19/20 01:59 PM
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bdcardinal Offline
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Sounds like the engine was not properly timed when it was reassembled. Ford probably didn't do a physical compression test, they just do a relative compression and power balance test using the IDS. That would explain the cam sensor fault.


2014 Ford Mustang GT Track Pack
1995 Ford Mustang GT

Ford/Mazda Parts Counter
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Opinions expressed are my own.
Re: What could have caused this? [Re: wtd] #5433372 05/19/20 02:01 PM
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zfasts03 Offline
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I agree recheck compression on all cylinders and take it from there. I would be looking more closely at the valve train.

If you added 5000 miles since the previous repairs I think it is unlikely anything was done wrong.

Last edited by zfasts03; 05/19/20 02:10 PM.

- 03 Corvette Z06
Amsoil 5w-30 SS
- 07 Honda Accord 2.4L
Amsoil 5w-20 SS
- 16 Suburban 5.3L
Amsoil 0w-20 SS, XG10575(16-28 by-pass)
- 18 4Runner TRD Off Road
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Re: What could have caused this? [Re: wtd] #5433384 05/19/20 02:13 PM
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bdcardinal Offline
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Was the low compression on cylinders in the same bank? Incorrect valve timing will cause that.


2014 Ford Mustang GT Track Pack
1995 Ford Mustang GT

Ford/Mazda Parts Counter
NRA Benefactor Member
Opinions expressed are my own.
Re: What could have caused this? [Re: Trav] #5433415 05/19/20 02:48 PM
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wtd Offline OP
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This is the timing chain kit he bought. https://www.amazon.com/gp/product/B078T2G134/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1

The truck was at the dealer yesterday and he left last night to go back to work so I don't have any details on where the low compression cylinders were. I will text him and see if he knows.

If the timing wasn't set up correctly after the repair, wouldn't that have shown up immediately instead of 5,000 miles later?

No one else has done a compression check on the truck yet. He gets back into town Thursday night and is getting married on Sat so there will be no time to mess with the truck until probably next week. I'm not sure when he goes back to work.


2014 Mustang GT
1998 Chevy K3500
1998 Chevy K1500
(2) 1992 Cavaliers
1970 Monte Carlo
Re: What could have caused this? [Re: wtd] #5433417 05/19/20 02:53 PM
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wtd Offline OP
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He just texted me back and it is all on one bank. Cylinders 1-4 had low compression. They said cylinder 4 was the worst.

The thing that puzzles me is that the low compression is in bank 1 but the cam sensor codes are in bank 2. Why would that be?

Last edited by wtd; 05/19/20 03:02 PM.

2014 Mustang GT
1998 Chevy K3500
1998 Chevy K1500
(2) 1992 Cavaliers
1970 Monte Carlo
Re: What could have caused this? [Re: wtd] #5433429 05/19/20 03:10 PM
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zfasts03 Offline
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Were cam sprockets replaced, I don't see them as part of the kit? I bet one bank/cam jumped time.


- 03 Corvette Z06
Amsoil 5w-30 SS
- 07 Honda Accord 2.4L
Amsoil 5w-20 SS
- 16 Suburban 5.3L
Amsoil 0w-20 SS, XG10575(16-28 by-pass)
- 18 4Runner TRD Off Road
Amsoil 0w-30 SS, TRD filter
Re: What could have caused this? [Re: zfasts03] #5433433 05/19/20 03:14 PM
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wtd Offline OP
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Originally Posted by zfasts03
Were cam sprockets replaced, I don't see them as part of the kit? I bet one bank/cam jumped time.

No, the only things that were replaced that were not in that kit were the cam phasers.


2014 Mustang GT
1998 Chevy K3500
1998 Chevy K1500
(2) 1992 Cavaliers
1970 Monte Carlo
Re: What could have caused this? [Re: wtd] #5433435 05/19/20 03:16 PM
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Miller88 Offline
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I don't know about the 5.0Ls, but the 5.4 I took apart didn't have any timing marks. Would be real easy to get it a tooth off.


18 Forester 2.5I 6M
00 Jeep XJ
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Re: What could have caused this? [Re: wtd] #5433436 05/19/20 03:17 PM
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mk378 Online Content
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Things start falling apart and jumping around could physically damage the sensors.

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