b_have Posted February 17, 2005 Share Posted February 17, 2005 Ok, after completely rewiring some of my piggyback stuff, have discovered ANOTHER bad connection (intermittent) It seems to be around the bunch of connectors mounted to the left of the footwell underneath the side kick panel. Anyone know what these are, wiring Diag? Bet Ian C would know this! Link to comment Share on other sites More sharing options...
Ian C Posted February 17, 2005 Share Posted February 17, 2005 Heh. I've spent four months in my footwell so yeah, I know 'em. The connections are good on the Supra unless they are plugged/unplugged a lot, which is what buggered my ECU plug. Are you *sure* it's a connector on the left? Because I thought various things were at fault, but it turned out to be the various jiggling I was doing was causing the minute shifts in the primary loom, manifesting the poor connections at the plug. Other than that, you've got some important stuff going through those connectors - ignition and fuel injection functions for a start. What's the actual symptoms of the intermittent connection? -Ian Link to comment Share on other sites More sharing options...
b_have Posted February 17, 2005 Author Share Posted February 17, 2005 Thanks for your time Ian, It seems to be a connector in that area, but ONLY when the engine is cold. wiggle those plugs and the idle becomes smooth, next minute really lumpy idle again. My wideband is showing perfect lambda a/f while this fault comes and goes. One time the trac light came on while wiggling so i guess one of those connectors is related to that. I've searched for wiring diag but nothing comes up for that area. Think these connectors have had a hard life as i've pulled the engine a few times now. Apart from all this the car is flying! Link to comment Share on other sites More sharing options...
b_have Posted February 17, 2005 Author Share Posted February 17, 2005 Just did a diagnostic check and its showing 42 (speed sensor) and 21 (O2) Link to comment Share on other sites More sharing options...
Ian C Posted February 17, 2005 Share Posted February 17, 2005 Clear the errors, run the engine, and give the main wiring loom some serious wigglage. See what happens. Also, get hold of the wire going into pin2 of E10 (the single plug) and wiggle that, and do the same to pin 48 on E9 (the double plug). See if any codes get flagged. If it's idling rough, try prodding around the bottom row of wires on the middle plug (pins 61 to 70) and see what effects you get. All the primary sensor wires are in that area so any dodgy connection will show up. If you have dodgy connections at the ECU I found a way of refurbishing them - it's technically easy but a long shit job, see how you go before I launch into a big description -Ian Link to comment Share on other sites More sharing options...
Dave S Posted February 18, 2005 Share Posted February 18, 2005 V. interested in the ecu connector fix Ian....i've major intermittant probs there.... been trying for days to get the engine started..... cheeers Dave Link to comment Share on other sites More sharing options...
b_have Posted February 18, 2005 Author Share Posted February 18, 2005 Update...... Reset ECU , started engine, did some serious wiggling, perfect idle, no errors. Guess i should be pleased but i just know this is gonna bite me again. Thanks again for your help Ian. Link to comment Share on other sites More sharing options...
Ian C Posted February 18, 2005 Share Posted February 18, 2005 Haha you *think* you've fixed it now, wait until you've put the footwell back together. Evilness awaits you. -Ian PS Dave - harass me for a tech FAQ on sorting dodgy pins, I've got some relevant pics somewhere Link to comment Share on other sites More sharing options...
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