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#31
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Re: Cranks -- No fuel, no spark?
Sounds stupid but, did you checked the fuses? There is a ignition fuse somewhere..
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#32
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Re: Cranks -- No fuel, no spark?
Quote:
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#33
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Re: Cranks -- No fuel, no spark?
Check to see if the MIL (check engine) light comes on during bulb check. If it does not, the ECU is not receiving power. That's where I would start.
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2007 GS 450h-Active Stabilizer/Radar cruise 1994 L Blue 3.70 VTD ASE Master Automobile ASE Advanced Level Specialist Toyota Master Diagnostic Technician (former life) |
#34
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Re: Cranks -- No fuel, no spark?
Quote:
We have isolated the problem to the ECU not getting power. Thanks nifty, the check engine light did not come on. Now to figure out where it is losing power. I have been looking over the wiring diagrams, and cannot find a specific wire that feeds power to it. I would like to run a jumper to that wire and see if that changes things. Atleaste that way I will be 100% sure of the problem, and I could go from there. Also,thanks to evryone for the help! This is a great forum. Everyone here understands that the time spent on these cars is well worth it. This by far my favorite car out of the 25 or so I have had over the years. I'm tired of non-svxers telling me "cut our loses and get another car". They just don't understand |
#35
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Re: Cranks -- No fuel, no spark?
Put power to the red wire heading into the ecu... Fuel pump kicked on... cranked it over, got spark. Now to figure out where the power loss exists
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#36
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Re: Cranks -- No fuel, no spark?
Nice job dude! Considering that you live in CT, could there be corrosion on either the POS or NEG wires? I assume that all grounds have been cleaned?
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If it ain't broken it, doesn't have enough features!!! '92 SVX LSL '03 4Runner '96 FZJ80 Landcruiser '90 Mercedes 300E |
#37
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Re: Cranks -- No fuel, no spark?
#21 --- Horrible as it may seem, you must suspect the ECU,
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! |
#38
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Re: Cranks -- No fuel, no spark?
Did you end up pulling and replacing the #16 fuse??
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Chris "A person convinced against their will, is of the same opinion still" New?? Find the downloadable SVX Online Service Manual Here RECOMMENDED READING for newer SVX owners Here some cool info if not fully accurate. Last edited by SoCal LS-L; 07-31-2009 at 07:06 PM. |
#39
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Re: Cranks -- No fuel, no spark?
Good one.
A worthy query, as this fuse also protects the fuse pump relay circuit. Swapping with a good fuse would settle the issue.
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! |
#40
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Re: Cranks -- No fuel, no spark?
I cannot seemto find a wiring diagram that shows the ecu wires
I am trying to find which wire is supposed to be supplying it with power. If I can figure out which one it is, I may be able to follow it back and see where the root of the problem is. I powered it up by one of the red wires, and it started, but 2 things I don't know: -If thats the power wire for the ecu? -If the ECU iseven supposed to have a full 12v to it? I think if I find the right diagram, I may be able to see if it goes to a relay, resistor, etc... I feel alot better now that I have gotten to this point. Thanks again guys |
#41
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Re: Cranks -- No fuel, no spark?
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You never said if you inspected or replaced the #16 fuse....... |
#42
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Re: Cranks -- No fuel, no spark?
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I have ben looking through those diagrams... Is it MPFI control unit? Thats the only one I see, but I didn't think that was the ecu. |
#43
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Re: Cranks -- No fuel, no spark?
Its one and the same, and its also the unlabled one thats represented on the left that has the many teminals... im not sure if thats a typo or what, but its the ECU.
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#44
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Re: Cranks -- No fuel, no spark?
Ok thanks.
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#45
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Re: Cranks -- No fuel, no spark?
Well,t's back up and running
Thanks very much for all the help, hopefully I will be able to help one of you out one day. Heres what I have determined... I located the ecu power supply pins. Checked them... no power. Scraped a little insulation off of 1 of them, put power to it with a lead wire with a 10 amp inline fuse. Relay clicked, fuse popped immediately. Cut the wire completely, replaced fuse... still running as we speak, also took it around the block. I am lead to beleive, one of the power wires on the ecu has grounded out somewhere. I will never find that needle in this haystack, so I now have a new power wire with a 15 amp inline fuse. |
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