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M90 rebuild (rudy)

Discussion in 'Need for Speed!' started by jd4242, March 30, 2013.

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    1. jd4242

      jd4242 Elite Explorer

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      Well more issues now..got a exhaust manifold leak..the gaskets has become brittle and blown out in some places..knew i should've stuck with the metal gaskets. ..its going to be a PIA to change them out and i also have stage 8 locking bolts on them..
       
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    3. CDW6212R

      CDW6212R Hauls the mail. Elite Explorer

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      The fuel pumps do run on full voltage for pre-99 Fords. The bigger pumps though take more current, which can push the limits of the stock wiring, depending on how big the pump is. Stock is what, 80lt/hr volume, so 255-340 is a good bit bigger. I haven't read enough about cars with over 255lt/hr pumps, which do okay with stock wiring.

      I'd check the voltage at the rear pump wiring, while the truck is running. That might tell you enough to say that it's okay, or needs more wiring.

      I like the HFP pumps because they promise to last a lifetime, and have kits for the Explorer. I bought two of these recently and plan to make two fit inside my 98's tank; https://www.amazon.com/gp/product/B004NTOCQM/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

      BTW, for a filter, here's the best deal I found for an external unit that should cover my needs. I didn't check about E85 compatibility, or if it's good for serious high HP racing. But it's a nice large aluminum unit with a large filter, available with different fine screens.
      FUELAB 82832-2 828 Series In-Line Fuel Filter Long Length 6 Micron Fiberglass Element
      https://sportcompactwarehouse.com/f...ilter-long-length-6-micron-fiberglass-element
       
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    4. jd4242

      jd4242 Elite Explorer

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    5. jd4242

      jd4242 Elite Explorer

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      Whats left of them..they crumbled and fell apart when i took the headers off...
      20171021_094235.jpg
       
    6. jd4242

      jd4242 Elite Explorer

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      Mannnn i had a cut in the vacuum/boost line going to the pressure regulator...replaced the line and it works fine now..

      But i went ahead and replaced the regulator,pump and filter..

      The manifold gaskets fixed the leak also..workn on mounting my IC fan now..

      Looks safe right..lol
      20171021_150232.jpg

      Filters were pretty dirty also..
      20171021_180602.jpg
       
      Last edited: October 21, 2017
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    7. jd4242

      jd4242 Elite Explorer

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      Well the fuel pressure definitely rises when you gas it(vacuum drops) but cant tell obviously what its doing when WOT and boost kicks in but as far as the wideband is reading its doing the same thing it was doing on the dyno..

      You go WOT and gauge jumps to like 10.5-11 for like 2 seconds then slowly crawls up leaner and leaner..i did 2 pulls tonight and had to let off around 10psi because it was getting up to about 15..obviously its not tuned but something is causing it to go lean and seriously doubt it fuel pressure or flow now...personally i think he has the open loop programed wrong..every time it goes into open loop it seems to go lean...
       
    8. 4pointslow

      4pointslow Explorer Torture Tester Elite Explorer

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      If your fuel pressure doesn't rise with boost then it will run lean.
      Boost and fuel pressure are both measured in psi, so for every 1 psi of boost the fuel pressure should rise 1 psi.
      Make sure you have the regulator hooked up to a vacuum/boost hose.

      Vehicles always start in open loop, that means it is ignoring the O2 sensors and running off the base fuel tables with no correction.
      When they go into closed loop the PCM corrects for things based off the O2 sensor readings.

      What did you mean by you can not tell what fuel pressure is doing at WOT? Is the gauge under the hood?
       
    9. jd4242

      jd4242 Elite Explorer

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      It does rise as vacuum decreases. .yes the gauge is on the fuel rail..before it wasn't rising at all anytime..

      Wot it goes into open loop right??
       
    10. jd4242

      jd4242 Elite Explorer

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      Dyno tune rescheduled for nov 9 right before my birthday..
       
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    11. jd4242

      jd4242 Elite Explorer

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      Well add another issue to the list,water pump just started leaking out the hole
       
    12. 4pointslow

      4pointslow Explorer Torture Tester Elite Explorer

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      Yes at wot it does go into open loop, 70% throttle and up should force it into open loop.
      Also open loop when cold or first started.

      Damn water pumps! Hope you get that leak stopped up quickly.
       
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    13. jd4242

      jd4242 Elite Explorer

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      Played with it today and right about 70% throttle is when it goes lean..i cant really tell on cold starts because i think it takes a couple seconds for my wideband to start reading right then i can hear it switch from open to closed..it goes lean for about 20 seconds then starts jumping from about 14-15ish..i just think it needs the tune adjusted now,the pressure seems to be good..i will say when he adjusted it last time on dyno for My ethanol change,i had about e75 in it and now i have e83 so that might be why its off also..previous tune was for e50,i still had about 6 gallons of e50 in the tank when i topped it off with e83ish so it gave me around e75

      Water pump should be pretty easy..
       
    14. jd4242

      jd4242 Elite Explorer

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      So this happened today..luckily my buddies shop was right around the corner and had a spare pulley..
      20171024_090436.jpg 20171024_090430.jpg
       

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    15. CDW6212R

      CDW6212R Hauls the mail. Elite Explorer

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      Ouch, I hope it's okay, I know the belt isn't cheap either. What idler do have there, and have you looked at stronger alternatives?

      I recall a lot of discussion in a thread on the Corral, a guy with a big blower on a 363 I think it was, in an 80's LTD.
       
    16. boominXplorer

      boominXplorer Elite Ranger Elite Explorer

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      The tensioner idler is actually the same between the early ohv to the v8. We found this out this morning searching though all my spare junk. I think his issue was it was an aftermarket pulley with a very tight belt and it was the weakest point. I bet belt tightness has contributed to making the water pump angry also.
       
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    17. CDW6212R

      CDW6212R Hauls the mail. Elite Explorer

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      I agree. I wanted him to say it, and think that the belt and tensioner might need some reworking.

      I believe one of the top idler pulleys needs to move closer to the blower, to gain some more belt wrap. Then the belt doesn't have to be as tight.
       
    18. Centaurus5.0

      Centaurus5.0 Elite 5.0L Fiddler

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      [​IMG]

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    19. jd4242

      jd4242 Elite Explorer

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      Its a stock pulley and stock tensioner. .but yea it is very tight,i need a slightly longer belt..

      The water pump actually is a old water pump i pulled off the old 95 ranger i sold..it looked ""newish" thats why i used it..

      I also agree i need more belt wrap and a slightly longer belt..i just havent found a easy solution for adding a pulley setup like @Centaurus5.0 posted..ive definitely looked into making something like that but the bracket would have to be pretty crazy..
       
    20. vroomzoomboom

      vroomzoomboom Elite Canuck STOCK SUCKS! Elite Explorer

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      can you make a bracket that attaches to both the ac bracket and tensioner bolt then hang a pulley above the tensioner?

      edit
      never mind. i see the one hose would be in the way. been a long time since i have had a ohv infront of me
       
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    21. jd4242

      jd4242 Elite Explorer

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      Im thinking i may try go straight from power steering to supercharger, around sc and then around that idler pulley,then to the tensioner and alternator..that might give me more wrap on the sc,thats if the belt doesnt hit my intake pipe going from PS to SC..
       
    22. boominXplorer

      boominXplorer Elite Ranger Elite Explorer

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      That would work better I would think and the tensioner would probably be happier.
       
    23. CDW6212R

      CDW6212R Hauls the mail. Elite Explorer

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      Looking straight at the engine, can you get the right idler pulley more to the left, under the blower pulley? That would let you run the belt as you said, from the PS to the blower, and back around that idler pulley near the PS.
       
    24. boominXplorer

      boominXplorer Elite Ranger Elite Explorer

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      Moving that idler near the PS wont be easy. The ideal way would build a plate bracket from that idler mount to the tensioner mount like suggested above to mount 2 idlers on. Then maybe move the tensioner to where the idler under the alt is like in the 4.0 sohc's.
       
    25. jd4242

      jd4242 Elite Explorer

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      The thermostat pipe and housing i think is in the way..

      Im pretty sure the belt clears that pulley going straight from the ps to sc..i didnt have a belt when i first added that idler and ran the old belt that way
       
    26. jd4242

      jd4242 Elite Explorer

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      Well got the water pump fixed and rerouted my belts.end up with a K081065HD,about 7" longer...

      I also was getting erratic idle and a check engine light so I check the codes and got 211&212..tps codes..so i swapped the tps and set it to .96v...i also cleaned my MAF and changed my filter..then reset my ecm

      Now the truck wont accelerate without going really really rich..it idles and cruise fine but any push on the pedal and it jumps to like 11 and maxes out my gauge for rich..the CEL also has come back on and its only throwing a 212 code this time...

      I haven't done a engine running code test yet though, going to do that tomorrow. ..i have double checked my tps and its dead on at .965volts and 5v power..

      I didnt set my tps voltage when i did my motor swap so pretty sure it was off before it went out completely, do you think just the fact i fixed my pressure regulator and set my tps to correct voltage that it may just be that far off from what he did my tune last week to??

      Basically saying if he tuned it to say .78v and no rise in fuel pressure and now both of those are fixed,could it be causing me to run rich at acceleration only though,not at idle or cruise? ? Or do i have other issues going on now.....

      New belt direction, little more wrap and plan to space that pulley up more tighter to the belt coming from power steering..
      20171028_182305.jpg

      Old belt wrap..
      20171028_120920.jpg
       
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