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  1. gothicsera

    '95 TBI Misfire?

    I've swapped the temperature sensor for a brand new one and it's made no difference to the problem. Cold start is OK (apart from it not wanting to start at all earlier in the week it's been fine since) Hot it runs OK. Until you shut it off for about 30 mins and then restarts. After that the...
  2. gothicsera

    '95 TBI Misfire?

    Where is the pressure test point on these motors? I do have a gauge... I had a prod around this weekend, rotor, leads and cap all look OK (and are only a few 1000 miles old). I ran it until hot and then restarted it and it was acting up. Injectors looked to be firing OK. I unplugged the idle...
  3. gothicsera

    '95 TBI Misfire?

    My truck's developed a bit of an issue and I was wondering if anyone has had something similar before? '95 K2500 5.7 TBI It starts and runs just fine when its cold and it's ok when it's hot too. No problems. But if I stop and leave it parked for 30 mins or so and then fire it back up it has a...
  4. gothicsera

    LS Swapping my '95 Silverado (5.3 LM7)

    Yes, only difference is the bore size. Crank is the same.
  5. gothicsera

    LS Swapping my '95 Silverado (5.3 LM7)

    That's what I'm going to do. Already have a set of LS1 pistons and rods to fit. Just need to get the machining done. :)
  6. gothicsera

    LS Swapping my '95 Silverado (5.3 LM7)

    Washed the intake manifold out with some old fuel to clean all the old oil and gunk out of it. Then got the billet cable throttle fitted up. I gave the injectors a soak in my ultrasonic cleaner and they now look like new again. I'll refit them with new seals soon. I also got the crank removed...
  7. gothicsera

    LS Swapping my '95 Silverado (5.3 LM7)

    I've been a little tied up with other projects, but I'll be back on this in a couple of weeks :)
  8. gothicsera

    LS Swapping my '95 Silverado (5.3 LM7)

    After inspecting the engine bores the pitting in 2 of the bores is beyond honing out, so I am going to have to have it bored oversize... so I got hold of a set of low mileage LS1 pistons and rods and will be having the block bored to 99mm from 97. Apparently the walls are thick enough to support...
  9. gothicsera

    Fed up

    Doesn't turn? as in jammed?
  10. gothicsera

    LS Swapping my '95 Silverado (5.3 LM7)

    I'll have a look at the wiring diagrams and try and figure it out. I've given up on the motor for the time being as it needs a rebore. Plus it's been raining hard all day today so I decided to get the transmission rebuilt. I needed to strip it down to fit the 4wd output shaft anyway. Pulled...
  11. gothicsera

    LS Swapping my '95 Silverado (5.3 LM7)

    Haven't considered it to be honest. What year is yours? I stripped the rest of the motor down tonight, just the crank and cam to remove now, but the hardest part is done. Getting the crank pulley off. The bolt is done up FT... and the pulley is a press fit on the crank snout at well. Hard to...
  12. gothicsera

    '95 K2500 on the wrong side of the pond...

    I stripped the rest of the motor down tonight, just the crank and cam to remove now, but the hardest part is done. Getting the crank pulley off. The bolt is done up FT... and the pulley is a press fit on the crank snout at well. Hard to get a puller on it unless you have the special tools, which...
  13. gothicsera

    LS Swapping my '95 Silverado (5.3 LM7)

    Shouldn't need to splice much at all.... The LS to GMT400 harness is pretty simple from what I can make out. Aside from the power and ground connections: 1.The oil pressure sensor isn't used by the LS PCM, so replace the LS sensor with the one from the original engine to make the gauge work. I...
  14. gothicsera

    LS Swapping my '95 Silverado (5.3 LM7)

    Finished wrapping up the harness this afternoon. Just a couple of pieces to finish, but I'll leave those until it's in the truck and I know exactly where everything needs to be. I also made a start on tearing down the motor. It's certainly been stood outside uncovered at some point. Haven't...
  15. gothicsera

    LS Swapping my '95 Silverado (5.3 LM7)

    The C100 connector on the LM harness has been totally removed. The fuel pump relay will power the fuel pump directly. Not going to do anything with the oil pressure sensor.
  16. gothicsera

    LS Swapping my '95 Silverado (5.3 LM7)

    I haven't put it in the truck get, all the external connections are loose in the harness ready to be spliced in. From what I can find the electronic output on the transfer case is also 40 pulses per rev, which is what the pcm is expecting to see. Then you can remove the DRAC which is under the...
  17. gothicsera

    '95 K2500 on the wrong side of the pond...

    It's been raining here again - the UK weather sucks! I've more or less finished the harness off, I just need to finally wrap it up and check the layout of all the connections. I should be able to do that tomorrow. I then spent an hour working on the motor, starting to strip it down for...
  18. gothicsera

    LS Swapping my '95 Silverado (5.3 LM7)

    It's been raining here again - the UK weather sucks! I've more or less finished the harness off, I just need to finally wrap it up and check the layout of all the connections. I should be able to do that tomorrow. I then spent an hour working on the motor, starting to strip it down for...
  19. gothicsera

    4L80E Concerns?

    The 2-3 shift on a 4l80 is often softer than the others, even on a "built" transmission. I'd say yours sounds 100% normal. And behind a small block is likely to last almost forever! If the fluid is good and clean then don't worry about it. Change it at your next service, and have at it :)
  20. gothicsera

    '95 K2500 on the wrong side of the pond...

    More progress on the harness this afternoon. All of the extra wires have been traced and removed. All that's left to do is put in the wires for TPS and IAC as I converted from DBW to cable throttle. Then I need to fit a fuse and relay box and wrap it all up again. The connectors for the...
  21. gothicsera

    LS Swapping my '95 Silverado (5.3 LM7)

    More progress on the harness this afternoon. All of the extra wires have been traced and removed. All that's left to do is put in the wires for TPS and IAC as I converted from DBW to cable throttle. Then I need to fit a fuse and relay box and wrap it all up again. The connectors for the...
  22. gothicsera

    LS Swapping my '95 Silverado (5.3 LM7)

    I'm going to splice the transfer case VSS into the original sensor connector on the LM7 loom. Both should be 40 pulses per rev so it should work fine. You also need to hook up a wire to the PCM to tell it that the transfer case is in low range. I now have the motor, trans and harness back at my...
  23. gothicsera

    '95 K2500 on the wrong side of the pond...

    I now have the motor, trans and harness back at my workshop. Pulled the heads off the motor, very minor bit of water damage in one of the bores. I think it will hone out so just a new set of rings needed. While it's apart I'll replace the main and rod bearings too, seems silly not to really...
  24. gothicsera

    Still really slow....

    Very helpful, thanks for that... will have a play around and see if I can trace the fault. It might be nothing to do with the truck running like crap, but it's worth a shot. Like I said I'm not going to throw a lot of money at this motor as it will be coming out in a few months anyway.
  25. gothicsera

    Still really slow....

    Pulled the EGR valve off and it looked to be clean/clear. Apply vacuum and it opens ok. Ports in the head are clear too as far as I can feel. I pulled the vacuum line off the valve and can't feel any vacuum on it with the motor running, so I assume the solenoid isn't stuck open. So no further...
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