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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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Ford F-150 questions
On Mon, 02 Apr 2018 11:07:25 -0700, Gunner Asch
wrote: On Mon, 02 Apr 2018 12:05:26 -0400, Clare Snyder wrote: On Mon, 02 Apr 2018 02:39:20 -0700, Gunner Asch wrote: On Sun, 01 Apr 2018 23:18:19 -0400, Clare Snyder wrote: On Sun, 01 Apr 2018 19:44:08 -0700, Gunner Asch wrote: Now any vehicle newer than 1997 doesn't even see a sniffer anymore. If the OBD2 doesn't find a problem, you are GOLD. Depending on the year you can even have either 1 or 2 monitors not set - so you can sneak a surprizing amount of stuff through by keeping the tank either full or below 1/4 tank, etc to keep the monitor from setting. Monitor not set cannot report an error (such as a minor vapor emission leak, or even sometimes a dead or dying catalyst. (my 2002 Taurus 4 cammer has one empty catalyst and has gone as long as 6000km without turning on a CEL) Ive got a question for you Engine Mavins: Moby Dick..the 1989 E350 van (just checked..odo shows 15,895.1 miles..wife has been driving it) has a flickering check engine light when cruising down the road. No load..mostly on the flat and level at about 45-65 mph. NO codes..none..nada..nothing is showing up on my Acton OBD1 reader. Says everything is hunky dorey. She passed smog just fine as well about 6 months ago. Any idea what to check? Getting this 1988 F-150 to go with it..is interesting. Many of the same parts were used, despite it being a 302. So I had no issues doing a lil tune up last week during a couple evenings. --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus Check the charging system. On some of the old EEC IV systems the check engine will come on with bad charging system. Its got dual batteries. Engine cranking and lights run from the passenger side battery..all else runs off the drivers side battery. Coach battery Everything seems to be working fine. The EGR position sensor on an '88 Ford will cause that problem, and being "OBD1" - or technically EEC IV, it will not necessarily throw or hold a code.. Check the connections on the EGR - also check to be ABSOLUTELY CERTAIN there are no vacuum leaks in the EGR control system. Perhaps remove the EGR valve and clean the heck out of it. The postion sensor may be mis-reading the position, or the valve may actually be sticking Thanks! Ill check that. I dont know if John had replaced the EGR valve or not. We went to the wrecking yard and he stripped off a bunch of parts from an identical van with the 351W engine and installed some of them. Some...maybe...I think. there is a second "starter solenoid relay" that engages the second "accessory" battery when the engine is running...adding the second battery to the first so that it charges. When engine/key is off..the relay is not engaged and it does not connect the second battery to the first..so if the second battery fails or runs down due to use..it still allows you to start the vehicle on the first battery. Put your 'scope on the alternator output and check to be sure the output is constant. NOT LIKELY, but possibly the brushes are jumping and the charge is intermittent - which on SOME vehicles will screw with the CEL. Checked that...everything is working fine visa vis the alternator. No spikes, nulls or low volts. Could also be a bad ground wire (had that happenon Pontiac TranSport. There are a **** load of grounds..both in the engine compartment, under the dash and on the frame. I've cleaned/tightened all of them I could find. No joy as of yet. Thanks for the help btw. Much appreciated. Since John died..I've been having to fix this stuff..and finding that he made a number of bad calls and bad repairs. sigh. I got the Solus Pro scanner (EESC316) that I bought for him but all the code keys I paid for are missing except for the K13A key. I also bought a OBD1 adapter for it..but it needs to be powered up externally..so I have to determine if its center hot and then buy a matching plug. Any idea of the polarity of Snapon electronics? Sigh... I think this may..may read any missing codes..if I can figure out how to use it. According to John..no keys were necessary for OBD1 The battery pack is missing as is any power cable for the reader..unless it pulls power from the test plug My "Auto X-Ray" unit pulls power from the plug on EEC IV systems. Owatona units do not. Don't know about the Snap-Off stuff. |
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