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Motor pros..please step inside..odd issues with a Vort 350?

Discussion in 'Chevy Trucks' started by Plowinpro03, Dec 27, 2007.

  1. Plowinpro03

    Plowinpro03 Senior Member
    Messages: 151

    Well, today for odd reason my motor started to buck down as i just made it to the top of a driveway, peddel to the floor trying to get up int in 4wH. I was NOT plowing however i did have my sno-way 29T on the truck. Now, the only thing is i was low on fuel The truck is a 96 chevy Tahoe 350. It bucked/studdered pretty bad at the top, as i drove around to the other side of the driveway it sounded like it was knocking. The knocking soon turned into a quick ticking sound. Oil pressure was and is perfrect. Truck was not over heating by any means. So, i said "o well popped" motor and i drove it to my garage which is about 1mile away from the location i was at. The ticking went away, however the bucking was still there. Any ideas...so far i removed the valve covers and i dont see any knocked out rockers....so im not sure what the ticking noise is...or if it was a stuck lifter that got its way "unstuck"...any thoughts?????:jester:
  2. sechracer

    sechracer Senior Member
    Messages: 478

    no SES light?
  3. lawnmedic

    lawnmedic Senior Member
    Messages: 703

    Start by changing the fuel filter and filling up the gas tank. Possible low fuel pressure...
  4. sechracer

    sechracer Senior Member
    Messages: 478

    Being that it is a 96, I would suspect that if the pressure was low, it would not run at all..... Most need a constant 60+psi to start and 55+psi to run.
    I would do a compression check on all the cylinders.... sounds like a misfire but that should cause a ses light. A sticky valve or bad lifter could possibly do the same.

  5. TJS

    TJS PlowSite.com Addict
    Messages: 1,324

    If if does need a fuel pump. DO NOT. I repeat DO NOT put an aftermarket pump. Get a GM/ACDelco Pump assembly.
  6. racer67x

    racer67x Junior Member
    Messages: 24

    mine ('97 3500 454)lost power one night towing my 28' enclosed trailer up over a steep hill.

    the gas was down to around an 1/8 tank and I thought I'd make it home..I dumped a can in,it took right off again and haven't ran it that low since,didn't hurt anything though.
    must have been low pressure..maybe you leaned it out and burned a valve?
  7. doh

    doh Senior Member
    Messages: 252

    I am guessing a fuel pump, has it been hard to start lately?
  8. Plowinpro03

    Plowinpro03 Senior Member
    Messages: 151

    The fuel pump/fuel filter have all been replaced within the last 10,000 miles i know this for sure...all new lines as well. Checked all the lifters/rockers.....and i did a compresstion test. Every cylinder checked out with GREAT compresstion. However, I think my plugs may have been bad..or going bad..they dont have that many miles on them..however man do they have an insane amount of carbon build up...i haven't had time to fire it up, but i replaced the plugs, checked out the wires there good..(only prolly 20k on them)...the rotor/cap are in great condition as well... Thanks for all your help guys..
  9. Milwaukee

    Milwaukee 2000 Club Member
    Messages: 2,180

    that sound like my boss's gm 3500 with 350 engine it was dirty air filter plus tick actual stuck lifter why he have fram oil filter so he try different brand it stop make tick. Well he did change fuel filter it full of goof like green mold it stick. Keep in mind it was 1986 and own by city of Detroit. you be surpise they don't service like keep change oil or air filter. oil was sludge plus psi was 30 but now it almost improve since we put diesel to wash it then put 10w 40 oil now it have 60 psi

    well how to fix.

    change oil and oil filter.

    do you use fram oil filter? that cause problem you be better is sell before engine fail.

    well do you ever heard sea foam? you can find in auto shop. it have additave that help engine run better. when you got sea foam I would pour little of sea foam though carb it will smoke white then put in gas tank then drive. you would see improve very lot plus lot power that you couldn't believe performance.

    We would be glad if you found what wrong with that.
  10. Milwaukee

    Milwaukee 2000 Club Member
    Messages: 2,180

    Any update on this?

    Just want know if it work now.
  11. Plowinpro03

    Plowinpro03 Senior Member
    Messages: 151

    Yup..problems all fixed, also something i did was go and "re-creat" the situation when i placed the truck on the same hill..lots of oil was not getting to the pick up.....but EVERYTHING works great now, I usally run "Motor flush" threw my motor, i have awsome compresstion so no problems there, i use Puralator filters (every filters the same if your changing them every 3000 miles, all of them shut down and bye pass the oil after 4500 RPMS when you rev high to keep oil pressure up), i use Castrol GSX long life motor oil....
    Last edited: Dec 29, 2007
  12. Milwaukee

    Milwaukee 2000 Club Member
    Messages: 2,180

    Now we know what cause tick.

    Keep that way not good for engine it could get rubbing metal to metal.

    What wrong with snow plow? You mean it not lift up?
  13. sechracer

    sechracer Senior Member
    Messages: 478

    So what exactly ended up being the problem? Lack of oil from the oil pickup? Low oil? Shouldnt have had a problem, unless the hill is more like climbing a cliff......
  14. Plowinpro03

    Plowinpro03 Senior Member
    Messages: 151

    140,000 miles......Low on fuel (probably water in the line)...oil was a bit low...(needed about 3/4 of a quart of oil), full throttling up a good incline under load, pour spark plugs(never thought id need to change them so soon...they were Platnium split fires...waste of money..switched back to copper autolites) ..im sure all of this contributed to the problem were it just skipped a beat...........

    THEGOLDPRO PlowSite Veteran
    Messages: 3,136

    [​IMG]nice vr-4 engine, we had one a few years ago, and built it up, it was a monster of a car.
  16. scottL

    scottL PlowSite.com Addict
    Messages: 1,600

    Huh....Hmmmmmmm. Based on the limited description I would have put money on a faulty fuel pump ( they were notorious for that ) or a single fuel injector. Seen both before. For age of motor and oil not being picked up - not sure how you figured that out. Oh, well your running with fire now.
  17. Plowinpro03

    Plowinpro03 Senior Member
    Messages: 151

    These trucks were notorious for everything.......ive replaed the pump twice...they over heat and die out......Ive also have had to replace the actual wiring harness going back to the fuel pump too. A list of other things---wiper motors, 4wd actuator, rear leaf springs,..all the odd stuff seems to go........

    "Thegoldpro"........very few could pick that motor out and know what it is!!..haha..good show, i do have a 99 vr-4, modded to all insanity.

    THEGOLDPRO PlowSite Veteran
    Messages: 3,136

    what all do you have done to it, sorry for the thread jack lol. we didnt go too too crazy with ours, did a single out 3 inch straight pipe exhaust with no cats to an N1 muffler, used to breath fire lol, upgraded the intercooler's to a big front mount unit,replaced all the rubber intercooling piping with stainless,replayed the plastic y-pipe to a nice stainless one, upgraded the turbos to the gt357 magnums, and the list went on lol