HELP!!!! C5 ls1 swap won't start....
03-25-2015, 08:03 PM
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HELP!!!! C5 ls1 swap won't start.... Swapped in a stock 2003 corvette engine into my toyota truck. Using the stock engine harness and computer. I have efi live and have loaded a manual trans file to the pcm from tunefile.com. I am running a manual trans. Engine, harness, and pcm were originally from a automatic. Am I missing something? I converted the harness myself and used a bp automotive ls fuse/relay block. Any info and help is greatly appreciated.
03-26-2015, 05:52 AM
#3
Swapped in a stock 2003 corvette engine into my toyota truck. Using the stock engine harness and computer. I have efi live and have loaded a manual trans file to the pcm from tunefile.com. I am running a manual trans. Engine, harness, and pcm were originally from a automatic. Am I missing something? I converted the harness myself and used a bp automotive ls fuse/relay block. Any info and help is greatly appreciated.
If those areas are good & still no start, connect laptop to the PCM & pull up the virtual dashboard in the data logger. Look for any MAF, MAP, spark while cranking the engine, then check injector cycling & fuel pressure.
03-26-2015, 07:08 AM
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I have disabled vats.i have never done a crank relearn. I'll look into the neutral switch. I have a gauge on the fuel rail and I've got 62 psi there. I'm new to the efi live stuff so it's hard for me to navigate currently. I'm learning though. I will try/check said things after work tonight.
03-26-2015, 10:05 AM
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I have not checked for spark yet. Will be when I get home around 3 today. And if it's got spark I might try starting fluid. And I kind of doubt all eight injectors are stuck. But maybe. Engine has been sitting for 10 years.
03-26-2015, 01:03 PM
#7
If the engine has been sitting for 10 years with the fuel lines disconnected, it is somewhat likely injectors are stuck.
If starting fluid makes it fire, verify pulse to the injectors with noid light. If it has a pulse and fuel pressure, injectors are stuck. I had to boil mine to get it to run on more than 4, and it had only been sitting 1.5 yrs.
If starting fluid doesn't work, then it's spark related.
If starting fluid makes it fire, verify pulse to the injectors with noid light. If it has a pulse and fuel pressure, injectors are stuck. I had to boil mine to get it to run on more than 4, and it had only been sitting 1.5 yrs.
If starting fluid doesn't work, then it's spark related.
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03-26-2015, 09:48 PM
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Well I checked for spark. It had it. So I shot some starting fluid in it and it fired up! So I pulled the injectors. Like a couple of you said, "injectors could be stuck', they all were. I boiled them in water for three minutes then shot them heavily with carb cleaner as well as using a battery to pulse power to them. Also using compressed air regulated to 45psi to clean them out. Put them back in and the engine roared to life! Thanks guys for your help! Soooooo very much appreciated!
03-27-2015, 07:12 AM
#11
When I had the stuck injectors problem the first time, I started flushing new fuel through fuel rails that I had and capped them off with russell connectors and plugs. So far, keeping fresh gas sealed in them keeps them from drying up and sticking.
I also think boiling was a fairly efiicient way to clean them, I used dawn dish soap and couldn't believe how much crap came out.
Glad this worked out for you, sometime's they're too far gone.
I also think boiling was a fairly efiicient way to clean them, I used dawn dish soap and couldn't believe how much crap came out.
Glad this worked out for you, sometime's they're too far gone.