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Doc Hoy

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Doc Hoy last won the day on April 1 2017

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About Doc Hoy

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  1. Doc Hoy

    Engine runs rough at idle, idles too low

    I got my scanner about three days early so I messed with it a bit this evening. I cleared the emission system codes and they stayed off but I imagine they will be back on by tomorrow evening. I read the engine codes and found a Random Multiple Misfire code. I have a fail on number 2 but that only happened once in about three minutes. No other individual cylinder codes coming up. Now I do not get a code on any individual cylinders. I might add that I read codes on my other 1TC and got no codes and the dashboard reflects no codes. I dumped a can of Sea Foam into the gas tank (full) in the hopes of getting (or keeping) the fuel system clear. We shall see. So far, I like the scanner. Easy to use. Senses the VIN. I have to get better at using it to really tell if it is helpful. As I only paid 40 bucks for it , I don't feel too bad. Tnx, Doc
  2. Doc Hoy

    Engine runs rough at idle, idles too low

    Bought some Cataclean and some injector cleaner on today. Monday. As soon as I get a moment free I will try the Cataclean. I'll wait on the injector cleaner. I will not use them at the same time. I am really anxious to try this Code Reader. I did a good bit of comparison between the low cost (under a hundred) readers available. According to the various write-ups, the Ancel 410 came out slightly on top. All of the write-ups are vague on how comprehensive the readers are in terms of the data they return. It came down to a couple of unimportant factors: Screen size and characteristics or data presentation. Length of the cable. Front panel controls. Speed of delivery to my mailbox. Finally price. The Ancel was the most expensive but on top in all other categories. The rest of this week is monumentally busy at the restaurant so it won't be until prolly Monday but I'll give y'all a report on how I like it.
  3. Doc Hoy

    Engine runs rough at idle, idles too low

    OOOOPS. I got it backwards. I said, " On Gen 1s, there are two CCs in series. First is about a foot downstream from the exhaust manifold. Second is further back. First O2 sensor is not called an O2 sensor. It is referred to as the "catalist monitor sensor." The second is after the first converter and referred to as an O2 sensor. " The CMS is after the converter and the O2 sensor is before.
  4. Doc Hoy

    Engine runs rough at idle, idles too low

    My scanner arrives on 22 Sept. I'll mess with it then and post some comments. Mechanic never got an EGR code to come up.
  5. Doc Hoy

    Engine runs rough at idle, idles too low

    Got it. On Gen 1s, there are two CCs in series. First is about a foot downstream from the exhaust manifold. Second is further back. First O2 sensor is not called an O2 sensor. It is referred to as the "catalytic converter monitor sensor." The second is after the first converter and referred to as an O2 sensor.
  6. Doc Hoy

    Engine runs rough at idle, idles too low

    Got it. What about Cataclean?
  7. Doc Hoy

    Engine runs rough at idle, idles too low

    Bought an Ancel 410 code reader. Seems to compare well with competition. I am sure there are better ones out there. I'll let you know how I likes it.
  8. Doc Hoy

    Engine runs rough at idle, idles too low

    I pulled the pulse to the coils one at a time. Each one affects the engine about the same. He pulled the pulse to the injectors one at a time. Each one affects the engine about the same. Neither of us watched exactly how much the RPMs dropped but I would same something like 200. Keep in mind it is already idling at about 700 RPM. He measured compression and said it was "good". Didn't say exactly what. But reported that there is no problem with compression. Comparing of one truck to the other I'd say that power from one is about 20% off on the problem truck. Question: As regards the back pressure on the converter, what should it be? (What is normal?) Question: Have you ever tried additives like "Cataclean"? Do they work? How long does it take? Can I do more harm than good?
  9. Doc Hoy

    Engine runs rough at idle, idles too low

    GBL, I am thinking about getting a scanner and getting good at using it myself. However in this case my mechanic, who has been in business successfully for at least 30 years used his scanner (Don't know which scanner it is but I now he doesn't buy junk and he paid a lot of money for it.) and it returned codes consistently that the engine was misfiring on cylinders 2 and 3. 1. Would a clogged converter impact the performance of only two cylinders? 2. Is there a gas additive which can be used to gradually clear out the converter? 3. Do you have a recommendation as to which scanner provide accurate and comprehensive error data? It appears that swapping out the injectors is easy to do. I can get a set of injectors for about 50 bucks. I am thinking that with the miles on the truck a new set of injectors is not such a bad idea anyway. I have two of these trucks. The other one is a 2011 with 190k. It runs fine. I wonder if I should start planning on having the same issue with that one when the mileage reaches 205k. (That was a joke but I am actually half serious about it.)
  10. Doc Hoy

    Repair manual. Lemme try

    When I began having difficulty opening the manual from Tradebit, I emailed them and the person who was actually providing access to the file. Within two hours I had an email response from the guy who is selling the files. It contained a PDF of the entire manual. I think that is pretty darned good service.
  11. Doc Hoy

    Repair manual. Lemme try

    All, I downloaded the service manual from "tradebit". It is okay but not great. It does appear to be the Ford Manual. Has some good diagrams but only limited explanations. Notes advise opening FirefoxPortable.exe with "Wine". 1. I am still trying to learn how to do this. 2. I am not sure what this will do for me that I can't already do with the manual. The manual has already answered some of the questions that I had. I suppose it is worth the 18 bucks I paid for the download. But the experience should really be more seamless. Anyone who tries this should be ready for about an hour of fiddling on your computer followed by some less-than-intuitive routing through the manual.
  12. Doc Hoy

    Engine runs rough at idle, idles too low

    GBL, "How does the tc run off idle when driving or accelerating?" 1. Engine smooths out but slightly lacking in power. It is driveable and most would not notice the diminished power but I do since I have another TC to compare it to. 2. When attempting to accelerate from stopped there is no response from the engine whatsoever until the accelerator peddle is nearly to the floor. (It is as though I am not even pressing the peddle.) Then the TC takes off with nearly proper acceleration. (Throttle position sensor? Ignition module? Vacuum?) "How do you know the o2 sensors are bad?" They are original in an engine with 220k miles and the code for O2 sensors comes up. "When you swapped the plugs were they replaced?" Yes. Replaced four plugs and four coils. Plugs were a little fouled but no improvement in performance at all. "When the coils and plugs were changed was the tc scanned again?" Yes. Misfire on two and three came up. It was not scanned before the plugs and coils had been replaced. I need a manual that shows me where the O2 Sensors and ignition module are. I am thinking about changing the Throttle position sensor unless someone tells me the symptoms are a long way from TPS. I am thinking about a set of injectors. (I know that the indication I described implies injectors are okay, but I am wondering of two injectors could be partially fouled.) Injectors are not expensive and if they are easy to change, what the heck. As advised by a previous responder, I am thinking of the cheap and easy things. The reason for that is that I am convinced this thing will wind up at the Ford dealership and I don't trust them. They will pester me about every little thing that a truck with 220k on it should have replaced without regard to whether or not it needs it. Then they will "Easter egg" the problem changing everything they can think of until they find the actual problem. They will charge me for the entire project including the things that had nothing to do with the symptoms. Are you getting an impression that I have a low opinion of Dealerships? Hope no one is offended. If I have to resort to a dealership I will prolly pay them to diagnose the problem and then either fix it myself or let someone I trust fix it.
  13. Doc Hoy

    Engine runs rough at idle, idles too low

    Back to this issue. I have been driving this TC with the minor miss in the engine. It is now getting worse. Took it to a mechanic who read codes implying misfire of cylinders two and three. Compression is even in all cylinders. I had already swapped out plugs and coils to no avail but he tried coils again. No help. He pulled the connectors to the injectors one at a time and found that disabling each injector creates a noticeable change in engine performance. Injectors are not expensive. I am thinking I might get a set and replace them. Have anyone done this and if so, how bad is the job. I also need O2 sensors which I would do myself if the project is not too intense. Anyone done this? If so, any tips? Also....Is there an ignition module and if so, where in the heck is it?
  14. I am looking for a good source for a repair manual for my 2011 and 2012 TCs. Seems like these things should available in the right version (North American Gas Engine) at a reasonable price. Last entry I found on this forum was from 2015 and spoke of a manual at 70.00. Now they are 100.00. Another spoke of a manual which only included info on the Diesel version. Tnx, Doc
  15. Doc Hoy

    Runs rough, Starts hard, slightly reduced power

    To MRTN, Thanks. I think I have pretty much confirmed the engine has a timing chain. To GBL, Thanks. No, I haven't. In fact I want to replace the O2 sensors but wasn't able to learn their location. To fifty150, Thanks. My shop teacher wasn't that nice. He had some more specific things he would say to us. To Mike, Thanks again. Don't know the numbers on the compression test accept to say that they were consistent in the cylinders. (Mechanic's words were, "You don't have a bad cylinder.") As regards idle, the truck runs rough as though there were a misfire on a cylinder. As regards acceleration, it acts like a carburetor car with a bad accelerator pump or a leaky vacuum advance line. Also, in my first response to you I mis-spoke. I reported that the truck "always runs rough." and that is not the case. I should have said it "always idles rough". At speed it smooths out but is slightly lacking in power.
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