Intake Manifold Suggestions
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Intake Manifold Suggestions
Just wanting to know if any of you have the 89 or later 360 trucks and if you have put a better intake manifold on it with the adapater plate to keep the factory tbi and if it's worth the money. Truck runs pretty good but it has a backfire in it at low revs which I believe is a fuel pressure or IAC problem. I also read that the heads on these "pre-mag" engines don't work well with carbs.
Rookie
Joined: Dec 2009
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From: Bismark, Ontario, Canada
Had a similar problem with my tbi 318, it was the egr valve . Maybe check that ... The cheapest and most effective upgrade is to make you own intake spacer . If you have a machine available
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Thx for the reply dirt. I will probably make my own as i have researched and found 2 made out of steel for like 100 bucks and i could whip one up for less than 20. Oh and i dont have an egr any more lol. Friend of mine and myself think it is in the fpr its needs a new one and a filter anyway still has the stock fpr and iac from the factory lol.
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Well if the fuel pressure regulator is bad or going that way then it will intermitently cut fuel pressure to the injectors which will cause a delayed fire or dry fire. As far as yge idle air control i need to replace it because of the poor idle quality sorry i didnt specify that one.
Champion
Joined: Mar 2009
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From: Bent Mountain Va
In my experience a delayed fire or dry fire will show up as a miss not a backfire. Lack of fuel won't cause a backfire. Back fires are usually caused by timing issues or excessive heat buildup that cause fuel ignition at inappropriate times or in inappropriate places or both.
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Captain
Joined: Mar 2006
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In my experience a delayed fire or dry fire will show up as a miss not a backfire. Lack of fuel won't cause a backfire. Back fires are usually caused by timing issues or excessive heat buildup that cause fuel ignition at inappropriate times or in inappropriate places or both.
Record Breaker
Joined: Mar 2010
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From: Pittsburgh, PA
How are your spark plug wires? I had a garbage set of wires on my truck for a while that started cross-firing after a few months. That was no fun. If I got on the throttle hard at low RPMs at would backfire out the tailpipe like none other.