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Getting Desperate - backfire/popping from intake
11-12-2012 | 07:09 PM
#61
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Joined: Jan 2011
Posts: 1,746
Likes: 6
From: 46 50' 36.82'' N 122 19' 41.01'' W
No the backfireing will burn all traces of fuel. And oil and carbon eventually
As far as adjusting valves goes. I dont think its that. Id say valve timing.
As far as adjusting valves goes. I dont think its that. Id say valve timing.
Last edited by ThatGuy1295; 11-12-2012 at 07:23 PM.
11-12-2012 | 11:50 PM
#64
Registered User
Joined: Oct 2009
Posts: 1,034
Likes: 1
From: Springfield, Orygun
Hook up a vacuum gauge, at idle, and while revving the engine. Video the act, and the gauge's behavior. Upload to YouTube or photobucket, then link here. If you're holding a steady 18 in/hg at idle, I think your valves are ok. Does the vacuum gauge needle fluctuate at idle?
'89 22RE 4x4 longbed DLX
Sent from my LG-P505 using YotaTech
'89 22RE 4x4 longbed DLX
Sent from my LG-P505 using YotaTech
11-28-2012 | 09:48 PM
#65
Thread Starter
Registered User
Joined: Aug 2010
Posts: 61
Likes: 0
well i bit the bullet and had it towed to a shop. They had diagnosis within the hour ....flat cam lobe, yup vital22re called it back on the first page!
Mystery solved
truck is fixed
wallet is empty
Thanks to everyone for their input and recommendations.
Mystery solved
truck is fixed
wallet is empty
Thanks to everyone for their input and recommendations.
12-03-2012 | 11:37 AM
#66
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Joined: Aug 2010
Posts: 61
Likes: 0
thought i'd post a pic of the cam for those inexperienced (like myself), this will give you an idea of what to look for when you have the valve cover off and are turning the motor over by hand.
culprit was the cyl #3 exhaust valve, as you can imagine the rocker arm was toast too.
culprit was the cyl #3 exhaust valve, as you can imagine the rocker arm was toast too.
12-08-2014 | 05:34 PM
#68
Registered User
Joined: Nov 2014
Posts: 10
Likes: 0
From: NH
im thinking its a valve... i just put in new heads cams valves in my truck 3vze 3.0 v6 drove amazing for about a month then i started getting the same popping sound from the intake i refused to think it could be just that 2 months later after not driving it i took it all apart and the dam cams were warped had flat spots and #1 exhaust lobe was completly rounded out so it wasnt opening the valve, got parts from japanengine.com 800$ an now r junk only 1500 miles on them, i would check there dont doubt it, i ended up spending 500$ more on other stuff trying to solve the problem with no luck!
01-22-2015 | 09:20 AM
#69
Registered User
Joined: May 2014
Posts: 62
Likes: 1
Wow congratulations budget builder on nailing the problem, I'm sure it feels so good.im looking for some help. I got a 94 3.0 with a bad backfire (or after fire) when decelerating, it's so loud it sounds like a gunshot...I deleted my cat and just got a new walker sound fx muffler (it's what the truck had when I bought it), but I notice some leaking exhaust in my exhaust pipe (rusted holes) leading up to my muffler. Could this cause the backfire? Thank you for any help.
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