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Old 02-28-2010, 09:17 AM   #11 (permalink)
4320Diesel
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are the front hubs locked? my truck vibrates a little bit from 100-120 with the hubs locked. if i unlock em the vibration is gone.

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1985 GMC (The Brown Streak) Sierra Classic 1500 4WD With 6.2L V8 Diesel and 4speed NP833 trans with hurst shifter! , 4911 6.5 ip with 6.5 shortie injectors GM-3 turbo. Single plane J code intake from Turbonator (thanks guys!). 3" exhaust and 3" BBQ black stacks! Isspro Pyrometer, Trisco Boost and Engine Oil Temp Gauges.
1998 Dodge Ram 2500 Sport club cab short box 4WD 5 speed 12 Valve cummins. Brentbilt fuel plate. 300 horse motorhome injectors, boost elbow, timing bumped to 18* autometer boost and pyro, 500 horse valair clutch waiting to go in!
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Originally Posted by diaric View Post
your wrong brent, i'll think of a reason later

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Originally Posted by diaric View Post
brent can't do that, it would look factory, lol

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Brent is right.
Was there any ever doubt?
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Old 02-28-2010, 09:21 AM   #12 (permalink)
Jodean
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what, no lift pump test???

while the engine is running, open the t valve at the front of the engine, well find the hose that fuel is going to come running out of first and put that in a bottle. If the motor dies when you open the valve you have a bad lift pump ( i cant remember if 90 has electric or not)

You could try advancing the timing, but usually you will get good milage if the pump is retarded.

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Old 02-28-2010, 09:50 AM   #13 (permalink)
MrBanjo
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Quote:
Originally Posted by roddydog View Post
Is there a way to convict or clear the harmonic balancer?
short of pulling it, not that I know of. If it is the harmonic balancer you would have the vibration in or out of gear, not just while running down the road.

I'm down with the wheel balance issue. I have noticed when I get some slush/snow buildup inside my rims i will get some vibrating. a quick run through the car wash takes care of the problem.
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'84 K5 190,000 miles. J code, turbo 350E TQ has a manual lock out, 3/4 ton rear end rollin on 33's, straight pipped, DSL/WVO. (Daily driver)

'99 burb w/6.5 upgraded the fuel system. Twin Tank, SVO/DSL. SS Diesel PMD, K&N Intake, New turbo, New IP, 3" straight pipe 45* bend out the back 3.5" slant tip. 230Kand counting (MY RIDE)
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Old 02-28-2010, 09:55 AM   #14 (permalink)
4320Diesel
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grab the outer part of the balancer and if it moves without the engine moving its bad. also you can look at the rubber from the back of it. if its all cracked and busted up its usually bad or on its way out.
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1985 GMC (The Brown Streak) Sierra Classic 1500 4WD With 6.2L V8 Diesel and 4speed NP833 trans with hurst shifter! , 4911 6.5 ip with 6.5 shortie injectors GM-3 turbo. Single plane J code intake from Turbonator (thanks guys!). 3" exhaust and 3" BBQ black stacks! Isspro Pyrometer, Trisco Boost and Engine Oil Temp Gauges.
1998 Dodge Ram 2500 Sport club cab short box 4WD 5 speed 12 Valve cummins. Brentbilt fuel plate. 300 horse motorhome injectors, boost elbow, timing bumped to 18* autometer boost and pyro, 500 horse valair clutch waiting to go in!
Quote:
Originally Posted by diaric View Post
your wrong brent, i'll think of a reason later

Quote:
Originally Posted by diaric View Post
brent can't do that, it would look factory, lol

Quote:
Originally Posted by Trios View Post
Brent is right.
Was there any ever doubt?
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Old 02-28-2010, 10:24 AM   #15 (permalink)
roddydog
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Quote:
Originally Posted by Jodean View Post
what, no lift pump test???

well find the hose that fuel is going to come running out of first and put that in a bottle.
Not quite following you on this. Please clarify. Also how do I make my pump retarded?
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Old 02-28-2010, 02:41 PM   #16 (permalink)
smackzed
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Theres a fuel bleed on you fuel filter. I think that's the hose he's talking about
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Old 02-28-2010, 09:02 PM   #17 (permalink)
MrBanjo
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Quote:
Originally Posted by roddydog View Post
how do I make my pump retarded?
there are two lines to time the IP. one is stamped on the IP itself the other is stamped on the block. In a ideal world you line up the two marks, and bada bing your golden. to advance the pump turn the pump toward the drivers side to retard back it off to the passenger side. a little movement goes a long way. 1/16 is usually enough.
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'84 K5 190,000 miles. J code, turbo 350E TQ has a manual lock out, 3/4 ton rear end rollin on 33's, straight pipped, DSL/WVO. (Daily driver)

'99 burb w/6.5 upgraded the fuel system. Twin Tank, SVO/DSL. SS Diesel PMD, K&N Intake, New turbo, New IP, 3" straight pipe 45* bend out the back 3.5" slant tip. 230Kand counting (MY RIDE)
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Old 02-28-2010, 09:24 PM   #18 (permalink)
4320Diesel
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well to make your pump retarded, you could let it hang out with me for a day
__________________
1985 GMC (The Brown Streak) Sierra Classic 1500 4WD With 6.2L V8 Diesel and 4speed NP833 trans with hurst shifter! , 4911 6.5 ip with 6.5 shortie injectors GM-3 turbo. Single plane J code intake from Turbonator (thanks guys!). 3" exhaust and 3" BBQ black stacks! Isspro Pyrometer, Trisco Boost and Engine Oil Temp Gauges.
1998 Dodge Ram 2500 Sport club cab short box 4WD 5 speed 12 Valve cummins. Brentbilt fuel plate. 300 horse motorhome injectors, boost elbow, timing bumped to 18* autometer boost and pyro, 500 horse valair clutch waiting to go in!
Quote:
Originally Posted by diaric View Post
your wrong brent, i'll think of a reason later

Quote:
Originally Posted by diaric View Post
brent can't do that, it would look factory, lol

Quote:
Originally Posted by Trios View Post
Brent is right.
Was there any ever doubt?
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Old 03-01-2010, 06:38 PM   #19 (permalink)
roddydog
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Quote:
Originally Posted by 4320diesel View Post
are the front hubs locked? my truck vibrates a little bit from 100-120 with the hubs locked. if i unlock em the vibration is gone.
nope - not locked
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Old 03-01-2010, 06:39 PM   #20 (permalink)
roddydog
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Quote:
Originally Posted by 4320diesel View Post
well to make your pump retarded, you could let it hang out with me for a day
took the words right outa ma mouth!

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