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  1. #1

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    New engine issues

    Ok, so I have went through the engine in my '02 SL2 after I found a cracked piston when diagnosing an issue with no power. The engine now has, 4 new Sealed Power pistons (standard bore), new Clevite 77 bearings (standard size) and Hastings rings. The head had a full valve job with new seals, guides checked out fine and a new Cloyes timing set was used with the original cams (very little wear shown on them). Only items that are original are the cams, injectors, intake, throttle body (with all original sensors), and exhaust manifold. The car has no power at all, it won't even go above 3500 rpm when driving it, and if I go full throttle with it, it actually slows down and starts hesitating. I've checked the codes and all I have is an EGR code (the valve is bad, just haven't replaced it). I'm at a total loss on what is going on, I'm starting to think one or both of the cats are clogged causing the issue, or I have a fuel issue somewhere. Here is a link to a video I just took around 8:15pm, car is totally cold. https://www.youtube.com/watch?v=asYQj8Oazos

    Thanks for any help with this, I have too much money in this engine for it not to run right.

  2. #2

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    Well the quick test is to disconnect the exhaust right below the manifold and take it for a drive. Caution it will be loud! What type of exhaust manifold do you have?

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  3. #3

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    I have that wonderful beastly oem unit that has the cat coming off of it.

  4. #4

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    Quote Originally Posted by BillyP View Post
    I have that wonderful beastly oem unit that has the cat coming off of it.
    I have the same one and I had the whole cat disinigrate and suck down in front of the second cat and had it plugged up. I took the exhaust system apart at the flanges and dumped cat parts out for a couple days. I would start there where I stated before! Make sure the exhaust port to tail pipe is not plugged either

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  5. #5
    Resident Electromotive Expert importsdontlikeme's Avatar
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    Are you positive when you reassembled the engine you set the cam sprockets (timing) correctly?


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    Interested in a solid engine management system? Ask me about Electromotive engine management.

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  7. #6

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    Yes, both gears were set with the arrows up, pinned in place when the chain was installed.

  8. #7
    Resident Electromotive Expert importsdontlikeme's Avatar
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    What about the bottom sprocket on the crank? That should be dead on TDC. And the chain should have lighter colored links to mark where it belongs on the cam sprockets and on the crank sprocket. Just because the sprockets were facing up doesn't necessarily mean the links on the chain fell in the correct spot.


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  9. #8

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    Yes, it was in TDC as well. I just pulled the manifold and have gutted it now. There were several pieces that light did not pass through. Going to start there and see

  10. #9

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    Make sure you have spark on each cylinder also

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  11. #10

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    Well, gutted cats work every time. Car is running fine, except the EGR code but I have another valve I'm going to try.

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  13. #11

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    Glad to hear that you got it fixed

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