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  1. S

    Ignition timing

    My 89 C3500 with 7.4 L big block has an interesting issue. Lately it has started throwing a code 44 lean condition SES. The idle was also staying elevated at about 1400 rpm. I looked for a vacuum leak and found none. Then I put my timing light on it without disconnecting the timing diagnostic...
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    Sensor identification help

    Okay I just tried to make myself crazy on this one. I have a 1989 big block powered C3500. Apparently the original sensor was a GM 10096165, which was superseded by a 14080661 and also known as an ACDelco 15-4441. Standard Motor Parts made it under TS239. They were temp sensors to activate the...
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    96 K1500 Low Oil Pressure

    This may sound extreme, but not as much as a full rebuild. Usually most of the pressure loss is due to wear of the thrust surfaces of the rear main bearing. On multiple occasions I have resolved low oil pressure by dropping the oil pan, replace the rear main bearing and oil pump. This can...
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    engine to tranny brace bars

    The braces from the engine mount to the aluminum transmission bellhousing are a four wheel drive thing to protect the bellhousing. The transmissions with the bolt holes for the aluminum cover also have a thicker bellhousing and extra strength where the tail-housing bolts on, because the 4x4...
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    TPI Swap into 1995 Sierra

    FYI, I installed a 406 TPI motor and built 700r4 into an IH Scout. I used a controller from a 1991 Corvette which has provision for electric fans. Speed Scene wiring did my ECM mods and built a plug in harness . Everything was labelled and plug and play.
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    Transmission goes boom.

    I used a Transdapt plate to bolt a built 700R4 behind a 403 Olds engine and it worked great. That 9 passenger Cruiser would rock with the overdrive.
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    Transmission goes boom.

    Kenny, if the transmission shop does the heavy duty upgrades to your 4L60e, you should be happy with it. It sounds like he is on the right track. Is he going to include the TransGo heavy duty builders kit? It will help the trans live longer. I used to own a transmission shop and have quite...
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    Headlights and spoiler

    The factory spoilers and air-dams you refer to are made of ABS plastic which is quite pliable and less prone to tearing than the typical after-market fiberglass pieces. FYI LKQ is an automotive salvage company, who owns the Pick and Pull chain. They are owned by Schnitzer Steel Company. When...
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    '94 350: good cold starts, struggles to crank when restarting or still warm

    I have two tbi OBD-1 trucks. Both of them had the same hard start conditions. I did all the old school checks and repairs, including large gauge cable to starter. In both cases, I found the timing was not changing when I disconnected the timing connector. So in both of my trucks, I replaced...
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    '96 C3500 CCLB dually. How much is too much?

    Regarding real world experience, my biggest question would be about the lowering method. If you did a C channel in the rear, I would be concerned. Otherwise the truck should be able to handle it. My '93 could. My '89 pulls a 20K fifth wheel. My '79 was used and abused pulling equipment for...
  11. S

    Missing parts/radiator size (She's alive)

    Peter, my 89 C3500 clearly came from the factory with AIR as the manifolds were smog units with plugs and all the brackets were in place for a pump. I also have a deep respect for the CA smog regs , as I remember the days of brown skies in Los Angeles. Thank goodness they are now blue again.
  12. S

    Missing parts/radiator size (She's alive)

    Hey Bigboom997, if you are in CA, like me, BAR will require the pump to be in place and operational to pass smog. I have an 89 big block truck and a 93 big block, of which neither had a smog pump. So I bought two smog pump assemblies to make them legal. The 89 came from Washington, but I now...
  13. S

    1999 7.4l lost oil pressure

    O'Reilly advertises Blue Streak parts.
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    '88 C3500 srw 454 oil pan R&R

    Just last week I did this on my 89 C3500 7.4L to replace rear main bearing, seal and oil pump. I only lifted the driver side of the engine about 2 inches to gain enough clearance. The exhaust crossover and flex plate can be an issue. I replaced the gasket with a one piece felpro rubber or...
  15. S

    454 tbi with 4l85E swap into c1500 350tbi

    Where can I find information about the 6L80 tuning?
  16. S

    454 tbi with 4l85E swap into c1500 350tbi

    That is quite true but those 4L80e transmissions are far from stock. I have researched the Hughes and Monster transmissions. If I was going to go with a purpose built custom transmission I would likely lean toward the six speed, maybe 6L90. In the bigger vehicles, like an Escalade, after 2007...
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    454 tbi with 4l85E swap into c1500 350tbi

    I just found the specs on the 8.8L engine and I'm with you. They offer a smog legal 10:1 engine with 500 HP and a steady 500 ft/lbs of torque. Oh yeah! That would pull my horses or my 40' fifth wheel. Plus it's a big bore motor, ala 502 style. :)
  18. S

    454 tbi with 4l85E swap into c1500 350tbi

    Has anyone done an apples to apples comparison between the gen 5 tbi big block and the gen 6 vortec big block. I have a nice virgin gen 4 short block and a complete gen 6 mpfi system to play with. I'm just wondering if it is worth the effort to change over. If so I would need to decide on...
  19. S

    454 tbi with 4l85E swap into c1500 350tbi

    Thank you for the correction. The 8.8 is interesting. I quickly looked online but can't yet tell what it is. If I was to do an 8.1, I would consider stroking it to a 540cid, which seems to be the most popular configuration for big power marine use. That is about the same as the 8.8L, or so...
  20. S

    454 tbi with 4l85E swap into c1500 350tbi

    Nice job on your update! When you did the interior update, how did you handle the wiring issues? I have a beautiful complete 97 interior to put into my 93 crewcab, but the harnesses are totally different at the firewall connection. I guess I can delete the air bag stuff, but then what...
  21. S

    454 tbi with 4l85E swap into c1500 350tbi

    The 8.1 liter gen 6 big block is very interesting from a tech standpoint, as it is essentially a stroker 454 to 496 set up like a LS motor. It has the 7-4 firing order swap, cathedral port heads, and individual ignition coils. Raylar and Dart both offer aftermarket heads for them. Several...
  22. S

    Delphi TBI distributor discontinued(?). What's next best option?

    Accel and MSD both make aftermarket versions of the TBI and MPFI big block distributor. Myself, I would pay for the MSD as their distributors are built to handle the high output spark of the MSD ignition boxes. It got sooooo tired of burning through the rotor of a stock HEI on my MSD equiped...
  23. S

    Starter problems

    I would suspect corrosion on the bendix piston or in the cylinder of the starter solenoid. Also be sure your truck still has the brace on the back end of the starter, which bolts to the block. It keeps the starter from torquing and hanging up. It's a little thing that makes a huge difference...
  24. S

    If it were your truck ????

    Bobby, I have had many big block trucks (duallies) as well as big block cars and race cars. Of course I have also had my share of small blocks. I have played with carbureted and injected motors. That said, I will offer some simple budget friendly thoughts. You would be amazed at how much a...
  25. S

    4L80E No Forward Gears But Strong Reverse?!?! Help

    If you unplug the communication cable from the transmission, it should be in second gear. That shouldn't require the torque convertor to stall up.

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