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Technical => Engine Tech => Topic started by: 87tbird302 on April 11, 2005, 09:49:14 PM

Title: 88 5.0 making popping noises from exhaust?
Post by: 87tbird302 on April 11, 2005, 09:49:14 PM
What would cause it to make a popping noise. Seems like it does it when it is at around 1000- and up RPMs. Im not sure what it could be? Also when my friend check the oil, he said it was thin-like and smelled like gas was in the oil, but would that make it to pop pop? Anyone know? Thanks
Title: Re: 88 5.0 making popping noises from exhaust?
Post by: t0x1k on April 11, 2005, 10:15:46 PM
Backfiring.... could be caused by anything, cold weather, timing, fuel to air, seals, gaskets, stuff....anything.
Title: Re: 88 5.0 making popping noises from exhaust?
Post by: blownbirds on April 12, 2005, 09:39:34 AM
check for vaccum leaks.
Title: Re: 88 5.0 making popping noises from exhaust?
Post by: blownbirds on April 12, 2005, 09:41:28 AM
the fuel your smelling in the oil is from improper combustion, meaning your getting cylinder wash, fuel ending up in the crank case.
Title: Re: 88 5.0 making popping noises from exhaust?
Post by: 87tbird302 on April 12, 2005, 03:10:13 PM
okay, so im stumped what should I do?
Title: Re: 88 5.0 making popping noises from exhaust?
Post by: Clayton on April 12, 2005, 10:11:09 PM
Quote from: blownbirds
the fuel your smelling in the oil is from improper combustion, meaning your getting cylinder wash, fuel ending up in the crank case.


how do you stop "cylinder wash" i have the same problem....
Title: Re: 88 5.0 making popping noises from exhaust?
Post by: 87tbird302 on April 13, 2005, 06:22:45 PM
What is causing it to have a cylinder wash? Should I change out my fuel rail? injectoers or what? HELP PLEASE
Title: Re: 88 5.0 making popping noises from exhaust?
Post by: 87tbird302 on April 14, 2005, 03:26:03 PM
anyone?
Title: Re: 88 5.0 making popping noises from exhaust?
Post by: t0x1k on April 14, 2005, 09:17:44 PM
O rings, valve seals, any seal that prevents oil from going into the cylinder and gas from going outside the cylinder.
Title: Re: 88 5.0 making popping noises from exhaust?
Post by: TurboCoupe50 on April 14, 2005, 09:34:16 PM
Quote from: 87tbird302
anyone?


The first thing that should be done is scan the EEC system for codes. But without a better description of you problem, you arn't likely to get a lot of help online.

The gas in the oil is because of either a over rich condition(possibly MAP sensor or fuel pressure regulator), or maybe a iginition problem(spark plugs, wires, dist cap).
Title: Re: 88 5.0 making popping noises from exhaust?
Post by: 87tbird302 on April 14, 2005, 11:02:01 PM
Do you know where I can find a diagnostic tester for a decent price? oh yea, what is the MAP sensor? thanks for the imputs, I appreciate it. oh yea to confirm things, when you run codes where do you plug it into: the EEC or ECU? I believe it is EEC, but some people were telling me ECU, so i just wanted to confirm things. THanks again.
Title: Re: 88 5.0 making popping noises from exhaust?
Post by: nirvanagod on April 14, 2005, 11:07:50 PM
Quote from: 87tbird302
Do you know where I can find a diagnostic tester for a decent price? oh yea, what is the MAP sensor? thanks for the imputs, I appreciate it. oh yea to confirm things, when you run codes where do you plug it into: the EEC or ECU? I believe it is EEC, but some people were telling me ECU, so i just wanted to confirm things. THanks again.



If you have A local Vatozone (autozone) and can get the car there, they'll scan codes for free.
Title: Re: 88 5.0 making popping noises from exhaust?
Post by: 87tbird302 on April 14, 2005, 11:42:00 PM
yea see thats the problem, no insurance for the car currently, since it's been sitting for a good 4 months now, also I don't wanna drive it there since it has that problem ya know. Thanks tho
Title: Re: 88 5.0 making popping noises from exhaust?
Post by: MasterBlaster on April 15, 2005, 09:00:43 AM
Quote
Do you know where I can find a diagnostic tester for a decent price?
Tester, shmester. Grab a voltmeter, a test light, or just a little piece of wire, and find the two EEC test plugs.

Here they are:
.
(http://www3.telus.net/neat/pics1/eec_test_plugs.jpg)

Here's what to do:
.
(http://www3.telus.net/neat/eec4.gif)

Quote
I believe it is EEC, but some people were telling me ECU,
Same thing.
Quote
oh yea, what is the MAP sensor?
Manifold Absolute Pressure sensor. Tells the EEC/ECU/Computer how much vacuum is in the manifold relative to the outside air pressure. It lives on the firewall behind the manifold and various other pipes and hoses...
.
Title: Re: 88 5.0 making popping noises from exhaust?
Post by: 87tbird302 on April 19, 2005, 09:14:08 PM
I figured since I had gas in my oil, that may cause it to backfire... would anyone else agree? Im going to drain the oil, and go from there.