Need Help: Strange Issues
#1
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Hello all! I don't post a lot on here, but i have finally been stumped. So, I drive a 1998 LS 400, 193k, and recently, the alternator went bad. after replacing said alternator, only about 3 days later the starter kicked the bucket as well. I was able to replace that just fine, and it cranked perfectly. it wouldn't start though. i replaced some other things as well, including the right vvt solenoid, and a coolant temp sensor. after all was said and done, it still failed to start. i shot in some starting fluid, and it ran on the starting fluid. so I know its a fuel issue. i undid the supply fuel line, and tried to crank it and nothing came out. am i missing something? any insight is much appreciated!
Last edited by CarNerd400; 03-03-21 at 08:22 AM.
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Hello all! I don't post a lot on here, but i have finally been stumped. So, I drive a 1998 LS 400, 193k, and recently, the alternator went bad. after replacing said alternator, only about 3 days later the starter kicked the bucket as well. I was able to replace that just fine, and it cranked perfectly. it wouldn't start though. i replaced some other things as well, including the right vvt solenoid, and a coolant temp sensor. after all was said and done, it still failed to start. i shot in some starting fluid, and it ran on the starting fluid. so I know its a fuel issue. i undid the supply fuel line, and tried to crank it and nothing came out. am i missing something? any insight is much appreciated!
Last edited by bradland; 03-03-21 at 11:01 AM.
#5
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It may well be a fuel issue but based on the recent alt and starter issues it's prob rooted in electrical. The ECU will cut off fuel pump power when some electrical components have failed causing the issue to appear fuel-related when it's actually another issue altogether...
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Have you checked the cam position sensor under the drivers side cam gear cover?
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The ECU is not in question it's simply doing its job when it doesn't receive a signal from certain electrical components. Where did you buy the new VVTi solenoid? Please don't say eBay or Autozone...
Have you checked the cam position sensor under the drivers side cam gear cover?
Have you checked the cam position sensor under the drivers side cam gear cover?
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I've replaced both starters on my 97 & 00 LS a few years ago & the later was much easier to replace as the plenum & upper intake manifold can come out as 1-piece. If you haven't touched any other components beside the plenum/intake manifold, fuel rails/injectors, etc... & if it's not the fuse and/or fuel filter then most likely it's your fuel pump which resides inside the tank, especially if it's still original. My 97 went out at 200K miles. Since you've stated it cranked but no fuel so that could be it. It's very easy to replace by just removing the backseat & pop the metal round cover. If it's indeed the fuel pump then you should replace the inline fuel filter by the rear axle as well. Good luck.
#10
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I've replaced both starters on my 97 & 00 LS a few years ago & the later was much easier to replace as the plenum & upper intake manifold can come out as 1-piece. If you haven't touched any other components beside the plenum/intake manifold, fuel rails/injectors, etc... & if it's not the fuse and/or fuel filter then most likely it's your fuel pump which resides inside the tank, especially if it's still original. My 97 went out at 200K miles. Since you've stated it cranked but no fuel so that could be it. It's very easy to replace by just removing the backseat & pop the metal round cover. If it's indeed the fuel pump then you should replace the inline fuel filter by the rear axle as well. Good luck.
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