Truck is Popping and poffing

[Captainbill]

ok here is the run down truck need a new ip so we put one in cleen the tank, lines and new filters .now the truck starts right up. but when running you hear a popping noise from the intake, and when you pull the intake pipe off of the air filter housing the popping gets louder and you feel air getting pushed back out. now the truck starts fine and move down the street just fine. any one ever had this happen to them?

 

[DanMartin]

Two things come to mind:

• Stuck/Bent Valve
• Injector Timing

When you put the new IP on, did you properly time it?

 

[Captainbill]

could it be the valve lash is wrong?

 

[Captainbill]

to let you all know a push rod fell out. so it was back firing

 

[Captainbill]

now after test drive truck feels slugish and iders

 

[JohnnyReb]

Ouch

Did it score the cylinder wall or beat up much internally?

 

[derby]

JohnyReb, I think you are refering to a connecting rod? unless I did not read the post right. Captain bill, I would check timing of IP and valve clearance. popping is usualy a valve issue like mentioned above. push rods don't usualy fall out .I would check the valve and the push rod on the one that fell out. Did You use any ether on it while trying to start it?...........

 

[JohnnyReb]

JohnyReb, I think you are refering to a connecting rod? unless I did not read the post right. Captain bill, I would check timing of IP and valve clearance. popping is usualy a valve issue like mentioned above. push rods don't usualy fall out .I would check the valve and the push rod on the one that fell out. Did You use any ether on it while trying to start it?...........

My bad.... . you know how you will read something and see what you think you see instead of what is actually written?

I was thinking.. connecting rod....

Thanks
JR

 

[Hammer]

Uhm, connecting rod = part that holds the piston to the crank shaft. Pretty large hunk of metal.
If this 'drops out', you usually have oil pouring out!

Push rod = part that goes between camshaft and rocker for valves. Small and long tube like rod, about 3/8" diameter, or close to that size.

 

[FMJ]

now after test drive truck feels slugish and iders

iders?

 

[nk14zp]

What made the pushrod fall out?

 

[Captainbill]

she starts great 1 to 2 sec of cranking to start. and no did not damage any thing push rod was not even bent thats where the popping came from. i reset the valves .010 on intake and .025 on exaust. truck still sluggish

 

[Captainbill]

i think it fell out from bad adjustment. see we had a few people working on this truck for 2 days so the covers where off and some one must have messed with it. other then that i dont know. like i told everyone rods not bent nor is the rocker so your guess is as good as mine.