i forgot to mention checking the intercooler for oil/fuel/water crud buildup. you can pull the hose off and use the engine oil dipstick to measure if it is significant. this stuff gets pulled into the intake and can cause misfires. again, idk why it would be bank specific but something easy to check.
Misfire 4 5 6
- Thread starter SeanDev
- Start date
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Man thanks, I can't believe I haven't looked, I have a 2013 f150 Ecoboost I had to drain, would sputter and misfire. Drilled a 1/16 hole and have self tap screw in it. Once in a while I take out screw and let her spit out everything for about a week. And it's no longer bank specific, both sides now suffer misfires. Did logs today, now have loud chirp under hard throttle then misfires. Leaning towards one or both fuel pumps, no rich/lean but massive drop in fuel pressure only under hard throttle. Going all back to stock. If she behaves, add DW300 back, see what happens. Since no tune is needed for that pump. Luckily EVO is still under warranty. Everything else has been replaced with new but misfires are getting worse. And not keen on dumping fuel into those $1,400 PPEs.
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Damn man
Well I spoke to soon. It behaved for for just a couple of runs, loud screech under hood, back to misfiring. Both pumps back to stock. Think what was mentioned by who I already forgot that a valve spring might have broke. She will sit until her build if that's the case. But now all back to stock, going to dealer that doesn't know this car and see if they can track it down. She will run, as long as I don't floor it.
highly unusual for a valve spring to break but ... usually one of the boltons fails first - hoses or turbos etc. or the block gets windowed, which curiously enough, has been more of a problem on the flex than the sho. always warm up engine before mashing the happy pedal.
hopefully the problem is a bolton.
hopefully the problem is a bolton.
She was at the dealer for five days I got her back at 5pm, they did catch that it had been a modified so I was called in for an interrogation because they found my meth wiring hiding under cowl.
All returned to stock before i dropped it off, they confirmed all my new parts and after 4 techs, working together they were at a loss. They even went through a quarter of a tank trying to find the issue, They 2 Confirmed all new plugs, coils, O2s, I Decided to run a complete list of PID in forscan did the whole lot, and all it showed no fault with any of those parts. Before I gave to dealer. Forscan is a great software, a lifesaver for Fords. They called me Thursday and stated that solution unsolved we might have to admit defeat. On a hunch I stated my 2013 interceptor Has a bad pcm, which fried it's board after a bad misfire which made car go haywire but never a code for PCM. On last effort to try not to get car back still broke, I brought up how years ago I had a pcm/ECM burn a board, and no codes, happened after a bad misfire. I thought no way could out of three Taurus's I had two PCM go bad after a bad misfire. As a last ditch effort I asked them to just replace it, what else it could be happen this point, replaced PCM and low and behind, no miss fires. I own a 2013 interceptor, used to own a 2015 SEL, what's a fluke out of 3 2013+ Taurus's I couldn't believe two of the three had fried boards after bad misfires. She is stock now b
I do believe though cleaning up the prior owners mess of his aftermarket alarm system probably helped a lot in the misfire issues.
All returned to stock before i dropped it off, they confirmed all my new parts and after 4 techs, working together they were at a loss. They even went through a quarter of a tank trying to find the issue, They 2 Confirmed all new plugs, coils, O2s, I Decided to run a complete list of PID in forscan did the whole lot, and all it showed no fault with any of those parts. Before I gave to dealer. Forscan is a great software, a lifesaver for Fords. They called me Thursday and stated that solution unsolved we might have to admit defeat. On a hunch I stated my 2013 interceptor Has a bad pcm, which fried it's board after a bad misfire which made car go haywire but never a code for PCM. On last effort to try not to get car back still broke, I brought up how years ago I had a pcm/ECM burn a board, and no codes, happened after a bad misfire. I thought no way could out of three Taurus's I had two PCM go bad after a bad misfire. As a last ditch effort I asked them to just replace it, what else it could be happen this point, replaced PCM and low and behind, no miss fires. I own a 2013 interceptor, used to own a 2015 SEL, what's a fluke out of 3 2013+ Taurus's I couldn't believe two of the three had fried boards after bad misfires. She is stock now b
I do believe though cleaning up the prior owners mess of his aftermarket alarm system probably helped a lot in the misfire issues.Attachments
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Zpak
Es Aich Oh!
Well, if nothing else I’m glad she’s back to healthy. Now throw them mods back on!
That's the first project in the morning, but afraid with such carbon build up I going to have to get EPP intake, i don't think I'm getting enough air with stock, and getting a rich fuel mixture, plugs were already in a bad state just 1,000 miles on them. dealer mentioned I was running very rich. Plugs wore.alreasy getting carbon failing.
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Zpak
Es Aich Oh!
Well, misfires could certainly be the culprit for richness.
And not to mention poorly operating ECM.
And not to mention poorly operating ECM.
Sucks it's happened twice in three Tauruss I've owned. All the misfires where not because parts but power going through ECM.. over a bad coil misfire that would send power back to ECM, why I had issues under hard load.
Zpak
Es Aich Oh!
Wish I would have thought about that sooner. I remember now my buddy telling me about an escape that had a bad coil smoke his ECM.
Interceptor I found a mks pcm for 50 bucks a let the dealer program it to car. I got burned by the sites they claim they can do it in house, dealer only charges $100 bucks to program,,, cheaper than those Rip off sites.
One thing I didn't do was read the look of spark plugs, all 6 carbon fouled. O2s carbon fouled. I kept them and took them to dealer. I've asked this but will EPP intake relieve some of the running rich? More air? Or is this maybe a tune problem? I don't want another PCM problem down the road.
This ended up being a techs answer to such a messed up diagnostic. Which ended up making alot of sense. This may not help anyone but and I will not confirm or lay blame on PPE, it's a great product. And don't believe they caused the problem. But I can see O2s taking there time to throw a code. So if anyone has lost all hope, and suffering misfires with all new parts, swap the PCM. I was told it's the one module that doesn't like to throw a code to let you know it's gone bad. I got the the PCM from a SHO with 10,000 miles, and with all the days they had it and with programming of PCM, and purchase of it , and wiring, bill was only $600. They honestly said they felt sorry for me. They saw I care about my car.
"Tech at the Ford dealer, believes the PPE may have during there break-in, carbon fouled the downstream, when engine was off fumes then worked up to upstream, laying soot on them, Causing a rich burn, but not setting off o2 codes. With rich burn all plugs then carbon fouled. I kept them and showed them to the techs. They took off back DP, completely black inside, and PPEs have been on the car for only 8 months. Then misfires sent voltage back to PCM, frying the board. Along with bad alarm install then removal added to voltage being sent back to PCM with numerous wires still found to be live."
I didn't even know the fuse panel and trunk leftovers from an alarm install existed. They found numerous live wires not taped or capped off. I reinstalled all mods I've done so far. And they did a great job fixing all wiring that was spliced into. Runs great and with recheck of plugs no wet oil on plugs, gives me hope there was no engine damage . Guess I'll be doing plugs every 15,000 miles and O2s too. Keep it safe.
"Tech at the Ford dealer, believes the PPE may have during there break-in, carbon fouled the downstream, when engine was off fumes then worked up to upstream, laying soot on them, Causing a rich burn, but not setting off o2 codes. With rich burn all plugs then carbon fouled. I kept them and showed them to the techs. They took off back DP, completely black inside, and PPEs have been on the car for only 8 months. Then misfires sent voltage back to PCM, frying the board. Along with bad alarm install then removal added to voltage being sent back to PCM with numerous wires still found to be live."
I didn't even know the fuse panel and trunk leftovers from an alarm install existed. They found numerous live wires not taped or capped off. I reinstalled all mods I've done so far. And they did a great job fixing all wiring that was spliced into. Runs great and with recheck of plugs no wet oil on plugs, gives me hope there was no engine damage . Guess I'll be doing plugs every 15,000 miles and O2s too. Keep it safe.
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