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- Newsgroups: alt.hotrod,wiz.hotrod
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!sol.ctr.columbia.edu!emory!rsiatl!hotrod
- From: hotrod@dixie.com (The Hotrod List)
- Subject: Re: Uneven Fuel Distribution
- Message-ID: <7xlqp5q@dixie.com>
- Date: Wed, 18 Nov 92 23:32:00 GMT
- Organization: Dixie Communications Public Access. The Mouth of the South.
- To: hotrod@dixie.com
- Reply-To: hotrod@dixie.com
- Posted-Date: Wednesday, Nov 18 18:31:56
- X-Sequence: 2783
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- Approved: jgd@dixie.com
- Lines: 41
-
- >
- > Hi, I have a '83 Firebird with the Chevy ZZ1 350 H.O. motor. It runs great
- > except it only gives me about 10 mpg city and highway. I checked to make
- > sure that the power valve is not broken. I also downsized the main jets
- > two steps. Air filter is almost new. Now when I pulled all the eight sparks,
- > I found out that six of them, except the #7 and #8, were very badly
- > fouled by carbon deposit.
-
- That's usually the first to plugs that have shown me any problems
- on any of my small blocks. I like to check them and if they look bad
- then it's time for new plugs. Also sounds loke your not doing
- much highway driving. You may want to try 2 numbers hotter plugs
- if that's true and you still get carbon foul.
-
- > When idling the motor gives 15" Hg vaccum and a
- > little bit of roughness.
- > Today I talked to a technician from Cagle Fuel Contral, where I am going
- > to order a so called "smart fuel regulator"(HRM Jan, 1992), which is
- > basicly a fuel regulator modulated by manifold pressure.
-
- They're a waste of money, believe me. seem to cause a lot of high speed
- missing do to loss of fuel pressure, or raw fuel.
-
- > I was told that
- > the bad distribution is quite typical for GM V8, and I have to either buy
- > another aftermarket intake manifold or I pull out mine and try to polish a
- > little bit to improve the distribution, and also their regulator will
- > greatly improve my gas milage.
- > Well, is there any similar experience and any comments on these.
-
- Well how mmany miles are on that engine. If there arn't to many
- maybe a trip to the nearest dyno will give you an accurate jet for
- your mill and the proper plugs for each cylinder. How is the oil
- consumption? Maybe perfect circle seals is what you really need.
- >
- > Thanks
- >
- > Jizhong
- >
- ----------
- Posted by: hotrod@dixie.com
-