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| Nigel |
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My cars previously did this (i6) when I didnt disable the O2. Thats not simulate it, but disable it.
I think the EEC is much faster than the LPG processors. Now of course, my EEC V in the EL is faster again, and it doesnt like having no signal, nor does it like the simulated one. I have 2 new O2's. The odd symptom I have is the car runs fine cold, and then it almost instantly starts to run on 50% of the engine - a whole bank goes missing. Im convinced its just an o2 failure for now, or the stupid thing has adjusted all of the fuel trims for the P/S bank to massively rich to try and get the o2 sensor to do something (Which it wont being disconnected). So as soon as we hit a warm map, we go half off the scale. Its still great at WOT. That and the stupid balancer hey!. Im almost convinced that its a source of trouble for me as well. Looking for a ST balancer now |
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| ToranaGuy |
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{USERNAME} wrote: My v8 only does it when its cold and once it's got it's stall out of the way it runs fine. I had a s**t of a time when I had my old 6 cyl Ef when it was dual fuel. It would stall and miss and just ran like a b**ch on both petrol and LPG. In the end I just ripped the LPG out. Is your eb running a injected set up or old school set up. If its an old school set up I would check the balance pipe for leaks/damage and also drain the wax/tar out of the converter. The balance pipe in my old Ef was prone to cracking and then the replacement would collapse under acceleration. In the end though my issue was electricial related and once i cut all the LPG wiring it ran sweet as. The Xr8 is running an old style impco 425, but it's not currently fit, and the car is switched over to petrol. No issues with the LPG converter, as the impco 425 isn't fit so it can't run on LPG atm. My Eb Ghia I6 is running injection lol. Your issue sounds like the LPG joint did a dodgy job on the wiring. Nigel - The V8's run a EEC V iirc, Just in-case it was an ecu issue I swapped in my spare (yes I have a spare v8 ecu!), no change at all. I can't wait to get healthier so I can change the fuel pump & filter, then try & get it running right on petrol. Cheers ToranaGuy
_________________ I am the ToranaGuy!|74 Lh Torana Turbo|78 Hz PanelVan|86 Mighty Boy Ute|93 EB2 Ghia,GT Mockup,5spd,LPGI,Full Leather|2 x EB Xr8 5spd's|{DESCRIPTION}|{DESCRIPTION}|{DESCRIPTION}| |
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| Nigel |
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(I did the wiring) LOL
On the EB, the trick was to bypass the O2's. It stopped the ECU from learning. Doesnt work as well on the EL with two O2's - and the stupid Gastec computer doent have a "no emulation" option. but its coming out. it has 1.5 weeks of life left. Runs perfectly on LPG. It never quite ran right on Petrol.. but thats why I think its the O2's. I can watch one bank stay perfect, and the engine instantly starts missing. Back to LPG and its all good. Remember though - this is my i6 EL Fairy - with a 200kw EL V8 now |
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| fiend |
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Intereted to find out what this is too!
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| ToranaGuy |
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If it doesn't rain it will be worked on tomorrow, feeling a lot better now I've had time to recover from the flu.
Cheers ToranaGuy
_________________ I am the ToranaGuy!|74 Lh Torana Turbo|78 Hz PanelVan|86 Mighty Boy Ute|93 EB2 Ghia,GT Mockup,5spd,LPGI,Full Leather|2 x EB Xr8 5spd's|{DESCRIPTION}|{DESCRIPTION}|{DESCRIPTION}| |
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| ToranaGuy |
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I tried it with one o2 sensor, then both disconnected. No change at all. Fit a new fuel filter, very dirty fuel come out of the filter, easier to start but still stalls. Took the intake pipe off & had a look in the Tb, can see a bit of water in there...awww crap, gasket swap time. Pulled the EGR & TB off, swapped the gaskets, put it all back together. Not much change, runs smoother but it won't idle. Give it a bit of throttle, it will run, but as soon as you back off it will stall. Damn.
I wonder if it has anything to do with this car being converted to manual? Factory ecu is still in there, I just removed the auto's controller. Manual gearbox wiring is hooked up correctly, so it cranks & starts all the time, no issues there. I even thought it might be to do with the immobilizer that is fit - so I bypassed it, no change at all. When it starts it rev's up pretty hard, like 3000, then it backs off slowly, to around 1000, then it will run there for a few seconds & then stall. Played with ignition timing, no change at all. Still haven't changed the fuel pump, but if it was the fuel pump, it shouldn't run if you keep the boot into it should it? I might have to try & see if I can get some codes out of the ecu, see if it's any help. Cheers ToranaGuy
_________________ I am the ToranaGuy!|74 Lh Torana Turbo|78 Hz PanelVan|86 Mighty Boy Ute|93 EB2 Ghia,GT Mockup,5spd,LPGI,Full Leather|2 x EB Xr8 5spd's|{DESCRIPTION}|{DESCRIPTION}|{DESCRIPTION}| |
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| Nigel |
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Interesting note about the manual conversion...
Does the car idle at all with the ISC disconnected? - on the I6 it should. I cant remember for the V8, but I also remember threads talking about the air bypass hole in the throttle body itself, and how that affects stalling etc as well. Without the trans ECU Connected your ECU will run bad timing maps I believe... either thinking its in reverse (torque reduction) or idle (not same advance). Weve already checked the MAF, right? Nigel |
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| ToranaGuy |
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I have a feeling your correct about the bad timing due to no auto. Once a few other things are sorted & it's driven under permit I will see if there is an issue with the timing, if so I'll get a j3 chip with a program to suit the manual + Gt40p's, extractors, cam & so on, that will sort it lol.
Yeah I've checked the MAF, gave it another clean, no change there. Won't idle with the isc disconnected. Traced the wires for the isc as they are butchered - found a dodgy connector, I think due to the LPG. Fixed that up, checked the timing again, looks good enough. Fired it up. Wow, it cranks for 2 or 3 seconds then fires up, rev's hard, comes back to idle & idles. Idled for a few mins! It's got a bit of a miss at idle but it idles! About 600rpm (too slow lol) Yay me! Warmed it up & shut it down again, as there is no fan in there atm, plus I need to flush some water thru the cooling system a few times to clean it out anyways. Timing might be a bit out, or it could be a dodgy coil for the slight miss, the connector for the main spark lead was corroded, but it was running fine in the other xr8 so I have not changed it yet. I've got a couple of spare coils, might swap it over soon & get a new set if leads too. Progress! Yay me! Cheers ToranaGuy
_________________ I am the ToranaGuy!|74 Lh Torana Turbo|78 Hz PanelVan|86 Mighty Boy Ute|93 EB2 Ghia,GT Mockup,5spd,LPGI,Full Leather|2 x EB Xr8 5spd's|{DESCRIPTION}|{DESCRIPTION}|{DESCRIPTION}| |
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| Nigel |
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Hmmm - forgot about the LPG DIdnt I.
Similar to the I6's - on LPG the ISC needs its main power feed removed from the injector harness, and moved back to the Injector power feed before the LPG Cut off relay which disables the injectors. Did the dying correspond with a switch to LPG by any chance, or some action by an LPG processor? The normal method of isolating the injectors on the V8 appears to be to cut the injector power feed at the connector on the engine. This serves two purposes - it provides ignition power to the LPG Processor, and it allows for the Injectors to be turned off. When the injector power is turned off the ISC looses power, so the ISC is normally wired back to before the cut at the same location that the LPG power is taken. That made no sense, but it might Nigel |
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| ToranaGuy |
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I get what your talking about in cutting into the harness. No it wasn't corresponding with a change from petrol to LPG, it was just a dodgy connector - at the relay end of the wire that was cut for the ISC.
Lpg isn't currently running, I need to swap in a new engine bay lock off (which I have one now), and then make up the adapter to fit the impco425. Then after all that, I need to get the gas joint to fit a vac solenoid so it will work properly on LPG I think. Sometime during the week I've gotta get the car I'm stripping into the driveway so I can pull some more bits off it. Cheers ToranaGuy
_________________ I am the ToranaGuy!|74 Lh Torana Turbo|78 Hz PanelVan|86 Mighty Boy Ute|93 EB2 Ghia,GT Mockup,5spd,LPGI,Full Leather|2 x EB Xr8 5spd's|{DESCRIPTION}|{DESCRIPTION}|{DESCRIPTION}| |
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| ToranaGuy |
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Last night I fired the Xr8 up & let it idle for a bit, still a bit of rust to flush from the cooling system, then moved it off the concrete part of my driveway, onto the dirt part of my driveway/car park, ready to put the one I'm wrecking on the concrete & pull a few more bits off from underneath.
I think this summer I need to lay down a slab next to my shed, make working on the car's much easier! Yep, it drove under it's own power, the power steer pump is pretty good, very light steering, not noisy at all, but there is way too much slop in the steering (worn uni on the bottom of the column I think) and no brakes yet, until I fix that metal brake line on the diff. I'll post up a pic of it before I fix it. I might get some new rubber brake lines for it while I'm playing with the brakes, I can get them cheap enough thru work. Also fired up the mighty boy, realized how much I miss buzzing to work & back in it, I've gotta get the manifolds swapped over & flush the oil soon, get it running properly again. Let's hope for some good weather this weekend! Cheers ToranaGuy
_________________ I am the ToranaGuy!|74 Lh Torana Turbo|78 Hz PanelVan|86 Mighty Boy Ute|93 EB2 Ghia,GT Mockup,5spd,LPGI,Full Leather|2 x EB Xr8 5spd's|{DESCRIPTION}|{DESCRIPTION}|{DESCRIPTION}| |
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| ToranaGuy |
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Today I had to do trip to the post office to mail a few parts out that I've sold recently, after that I got the Ghia in the driveway & let it cool down so I could work on it. It looks like the oil under the engine & on the sub frame was coming from the front crank seal.......
The balancer & front crank seal got changed today, a new seal & a s/h but still good balancer I had lying around the shed was fit. The old one, man, the rubber is stuffed, not as bad as I thought it would be, but it's missing bits & had lots of cracks in it. Also changed the spark plugs while I was at it, old plugs were fouled up from the leaky head gasket. Gotta change that soon, but have to help a mate do his tomorrow, then maybe next sunday I'll do mine. My cousin come over & gave me a hand to move the red Xr8 I'm stripping into the driveway, now I can remove the exhaust & the brake line I need, and a few other little parts too. I also talked to a mate at a LPG workshop on Friday in regards to the vac switch the impco systems run for lean cruise. I should be able to get it running on the 425 without worrying about that for now, and they will fit one for me when I get the rwc done. Progress, slowly lol. Cheers ToranaGuy
_________________ I am the ToranaGuy!|74 Lh Torana Turbo|78 Hz PanelVan|86 Mighty Boy Ute|93 EB2 Ghia,GT Mockup,5spd,LPGI,Full Leather|2 x EB Xr8 5spd's|{DESCRIPTION}|{DESCRIPTION}|{DESCRIPTION}| |
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| BenJ |
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Any progress is still moving forward.
Keep at it mate. Cheers BenJ
_________________ {DESCRIPTION} - Current Ride |
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| tickford_6 |
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Posts: 6449 Joined: 11th Nov 2004 |
{USERNAME} wrote: I also talked to a mate at a LPG workshop on Friday in regards to the vac switch the impco systems run for lean cruise. I should be able to get it running on the 425 without worrying about that for now, and they will fit one for me when I get the rwc done. This is correct. |
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| ToranaGuy |
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Thanks for the support Ben, your right, every little bit is still progress.
tickford_6 - thanks for that, it's little bits of info like this that help to keep projects moving along! Greatly appreciated for you verifying that info. I did a bit of a Google and found a wiring diagram for the 4046 unit & how to setup the vac switch, so with that info I should be able to get the last few bits on the LPG sorted. One night this week after work I might get a chance to get stuck into the LPG side of things. Today my mate found some cracks in his timing cover(explains where the oil leak was from at the front of his engine lol), so we had to do a wrecker run to get another one, didn't end up getting any work done on his car, it's still sans head. Cheers ToranaGuy
_________________ I am the ToranaGuy!|74 Lh Torana Turbo|78 Hz PanelVan|86 Mighty Boy Ute|93 EB2 Ghia,GT Mockup,5spd,LPGI,Full Leather|2 x EB Xr8 5spd's|{DESCRIPTION}|{DESCRIPTION}|{DESCRIPTION}| |
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