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  1. eric 87

    vaccum leaks

    Okay. On my truck the block doesn't have the provision for a mechanical pump. Man do I wish it did. BUT guys let me tell you this journey only to share the oddest things. Turns out my TBI system had two problems. I had replaced everything related to include the computer. All sensors and some of...
  2. eric 87

    vaccum leaks

    Thanks for the vote of one bolt at a time. I noted a small amount of oil before tightening them down again. Now nothing. I have a white sealant to stop leaks on bolts I think is permatex brand. It worked well on the intake plug I put in the coolant runner that was there for a temp sensor. But it...
  3. eric 87

    vaccum leaks

    appreciate. I did go around and retighten all bolts. All the intake bolts have washers however my carb nuts do not. I was thinking maybe I might switch those to the bolts that came with it as well. They have that odd head is why I didn't used them. Not the typical bolt head. I did tighten and...
  4. eric 87

    vaccum leaks

    I do appreciate that. I did notice on the drivers side there was about half teaspoon of oil below that back center bolt. THEN noticed I had an open hole for some bracket mount or something next to that bolt. I put a bolt in it. I have to pull it back out and put sealant on it. I went back around...
  5. eric 87

    vaccum leaks

    got a question. If it sounds like an existing let me know where to find and I will go. I have looked though and didn't see. Problem. My 87 GMC shortbed 305tbi th400 stock JUST got a carb swap. Its done and we can discuss which is better till the cows come home.....I like both. The problem is...
  6. eric 87

    Vacuum Leak???

    well my 87 just got a carb. I am having the same issue of it dying just as you described. It is much stronger with this 600cfm Holley Street warrior carb than the TBI ever was. However the TBI was rock steady in some aspects. Mine was just never right and I broke out the park gun to the tune of...
  7. eric 87

    Frustrated 87 GMC owner!

    Okay as promised I said I would get back and tell the truth good or bad in the TBI to carb swap. Funny this is going to be a mixed conclusion. Not 100% worked out the problem as I have some that....frankly are new to me. Yep so this starts off sort of if keeping score 1 for the TBI team. I have...
  8. eric 87

    Frustrated 87 GMC owner!

    Just as an aside...no one could ever tell me what the second relay was / is on the firewall next to the fuel relay. Never found it on any wiring diagram on 87. Turns out it is the TH400 kickdown relay. Not sure why they sent it through the computer and a relay but they did. The truck overall is...
  9. eric 87

    Frustrated 87 GMC owner!

    Yep Not sure exactly where I am heading with the truck. Still like the body style. And if I were to invest in a crate engine for it I think I can still be under 20k or there abouts. And it would be a new truck at that point. However I am wondering how many older cars/trucks I can have in the...
  10. eric 87

    Frustrated 87 GMC owner!

    Hey is there a way to update all my posts from one spot so it posts on all??? I did the TBI to carb swap. Mine is a 305 with th400 transmission. Well well well. Let me say this as I want to be fair, transparent and honest as someone else may not be as fortunate in being able to spend the money...
  11. eric 87

    1987 Burb TBI to carb swap

    The ECM was only about 120. And yes it sucked to toss out 700+/- on parts that are of no use now. I will list them on one of the facebook groups and be in no hurry to sell them. At least it didn't come out of grocery money. And the carb is on and it is starting/running. Haven't taken it down the...
  12. eric 87

    Jump AC compressor

    So there is bio wire coatings and it is a favorite of mice and other varmints. They have chewed on all my mowing equipment and the ford.
  13. eric 87

    1987 Burb TBI to carb swap

    Part of the FRIGGIN NUTS 700 was a new ECM. New ECM MAP SENSOR TPS (2) IAC (2) Temp sensors , O2 sensor. Nothing helped. Took to shop. He found bad pickup coil so put in NEW complete distributor he said he had for a small block on his shelf and sold me cheap as in 50$ but also rebuilt the TBI...
  14. eric 87

    Jump AC compressor

    Well I bought my 98 F150 in 2000. I had to put in another 4.2 @ 148k miles. Wrist pins came out upon start up one cold morning. Did a factory replacement through ford dealer and put it in. Now that engine has about 150k miles on it and it now clatters like a 72 LTD. BUT I will say about...
  15. eric 87

    1987 Burb TBI to carb swap

    Nope the reason I have been comfortable doing all this spending 700 on TBI and now 1000 on carb swap parts is that the engine checked out good in the shop. The only part the shop put in was the distributor because he found the pickup coil had no magnet. But compression and leak down and all...
  16. eric 87

    1987 Burb TBI to carb swap

    The plug was the four wire plug to the ignition module. It wasn't the source of the original issues which had been sorted. BUT in the process I think the shop that did the diagnosis on laptop since my OBD1 port wasn't working.....he found the bad pickup coil. I got the new distributor complete...
  17. eric 87

    1987 Burb TBI to carb swap

    My 87 GMC Sierra 305 TBI block had a mounting but no hole in block for pump pushrod. IN my swap I am using an inline electric. Was going to use in tank pumps but the right one went out and when I took off cover plate for selector valve the prev owner bypassed the valve with the left fuel line...
  18. eric 87

    Jump AC compressor

    Thanks again on looking at 84 harness for AC. Will do. I will be sure to post what I do when I get it all done. I could have just waited for the correct pressure regulator like everyone uses and kept parts of the computer working and removed the SES light bulb on the dash since all the...
  19. eric 87

    Holley 600 WTF moment---curious to know whats wrong

    Thanks for the....eulogy lol. OH how many times in my life that is true but someone was looking out for the idiot! SO we are in this together. Only in that we are going to learn from my truck! The pump hot and sender wires split off the harness before they get to the big plug that connects to...
  20. eric 87

    Jump AC compressor

    Thanks for the help. I am not using a quad-jet. Bought all new stuff from summit. It is a Holley 600 street warrior I think. Thanksgiving night when ordering many parts were on back order and not shipping until mid January so I bought some things that maybe would have chosen different to get it...
  21. eric 87

    Holley 600 WTF moment---curious to know whats wrong

    TBI is now gone. Which is why I am having to redo wiring connections for fuel system and AC. However worst case scenario is I have to wire these components before hacking out all the computer wiring and the computer itself. I will say this TBI to carb swap has been a learning curve. Just getting...
  22. eric 87

    Can’t get these gauges to work…

    there is a member named Hatzie on here that knows wiring inside and out.
  23. eric 87

    Holley 600 WTF moment---curious to know whats wrong

    I do take many posts or comments to my questions with a grain of salt. And this will sound like I am being ungrateful but am not. When I asked questions about the TBI to carb swap I caught a bunch of "love" of TBI and what a dumb idea it was....before any advice was given. I have on other...
  24. eric 87

    Holley 600 WTF moment---curious to know whats wrong

    okay this is just dumb guy logic....thinking out loud. I KNOW ZILCH about carbs so I am the 60 yr old kid at the table listening to the grown ups talking. But did you say you used this carb on a big block for a long time and it worked great? Ran great I think you said? But since taking it apart...
  25. eric 87

    Th400

    My 87 Sierra is a 305TBI with a th400. Shape is Tx pan. Has the wire coming off and no kickdown or detent cable. There are some 87's that did come out with the 700r4....probably the majority. Do not quote me on this but I thought someone told me it depended on which plant produced the truck. I...

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