1990 LS400 crank no start
#16
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#17
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Well my car won’t start, but I’m saying that it doesn’t come on with all the rest of the lights on the dash, and it also won’t come on when checking for codes. I took one bulb from a working light next to it and plugged it in but still no luck!
Oh yea and he works any motherboard repair but he didn’t hook it up to anything jus visually checked the caps. Maybe it’s good to send my ecu off anyways just so I don’t have to worry in the future.
Oh yea and he works any motherboard repair but he didn’t hook it up to anything jus visually checked the caps. Maybe it’s good to send my ecu off anyways just so I don’t have to worry in the future.
When I thought I had a fuel pump problem (recently) I was also doing other work. When I pulled the plugs out after cranking the car they were wet so I knew the fuel pump was working. Then I decided to try some starting fluid sprayed in the throttle body and the car did NOT start. So I knew it wasn't a fuel problem. I still think you have an ECU problem.
#18
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Ya can't tell if the ECU is bad just by looking at the caps. If the board looks good (with no caps leaking) it's a VERY good time to get it rebuilt, before the caps leak. Did you read (at least the beginning) the ECU thread I posted?
When I thought I had a fuel pump problem (recently) I was also doing other work. When I pulled the plugs out after cranking the car they were wet so I knew the fuel pump was working. Then I decided to try some starting fluid sprayed in the throttle body and the car did NOT start. So I knew it wasn't a fuel problem. I still think you have an ECU problem.
When I thought I had a fuel pump problem (recently) I was also doing other work. When I pulled the plugs out after cranking the car they were wet so I knew the fuel pump was working. Then I decided to try some starting fluid sprayed in the throttle body and the car did NOT start. So I knew it wasn't a fuel problem. I still think you have an ECU problem.
#19
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Yes I’ve read the thread prior to signing up and asking for help! I tried using to carb cleaner today and see if it would start but it wouldn’t but I sprayed from to intake after the maf. I think it might be an ecu thing as well. I don’t know if the sunroof has anything to do with giving clues but sometimes it won’t angle up and it also doesn’t close fully when it’s being used in the traditional back and forth manner. It’ll start closing but will stop about 4 inches away and then I’ll have to let go and trigger it again for it to fully close. I messaged LsCowboy on Facebook, hopefully he can still do something!
#21
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I would confirm that there are actual terminals in the B+ and FP and not just plastic spaces, they started taking those out in some cars pretty early in DLC1 and I'm not sure if they are in DCL2 under the dash. I will look when I get home.
You might have to use a jumper in the circuit opening relay but I don't have a schematic for that, I'm sure there's one on this site somewhere.
You might have to use a jumper in the circuit opening relay but I don't have a schematic for that, I'm sure there's one on this site somewhere.
#22
Do you know how to test relays? Remove the from the fuse/relay box one at a time and test them to see if they function.
#23
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Looks like you could just swap relays in you underhood fuse box, if it's the same....
CIR
OPN is it. Be careful there is a lock clip on those relays, they are tight and brittle from age.
CIR
OPN is it. Be careful there is a lock clip on those relays, they are tight and brittle from age.
#24
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#25
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I would confirm that there are actual terminals in the B+ and FP and not just plastic spaces, they started taking those out in some cars pretty early in DLC1 and I'm not sure if they are in DCL2 under the dash. I will look when I get home.
You might have to use a jumper in the circuit opening relay but I don't have a schematic for that, I'm sure there's one on this site somewhere.
You might have to use a jumper in the circuit opening relay but I don't have a schematic for that, I'm sure there's one on this site somewhere.
#27
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This is what I’ve got…
Looks like someone previously jumped it? Correct me if I’m wrong.
#28
#29
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It started
I don’t know if it’s because I took out that wire and replaced the EFI fuse or if it’s because I’d let the new ecu sit in for 24hrs but it starts and runs. Still having a misfire an a lil rough idle but my check engine light now turns on. I guess what’s next is the fuel pump and figuring out why the o/d light is still blinking
#30
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