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- From: v087mxgb@ubvmsb.cc.buffalo.edu (Shawn E Thompson)
- Newsgroups: rec.autos.tech
- Subject: Re: Nissan Pulsar/Carb. Problem
- Message-ID: <BunA43.Dqr@acsu.buffalo.edu>
- Date: 16 Sep 92 00:16:00 GMT
- References: <1992Sep15.212527.28047@philabs.philips.com>
- Sender: nntp@acsu.buffalo.edu
- Distribution: usa
- Organization: University at Buffalo
- Lines: 46
- News-Software: VAX/VMS VNEWS 1.41
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-
- In article <1992Sep15.212527.28047@philabs.philips.com>, srv@philabs.philips.com (Sreeraman Venkitasubrahmanian) writes...
- >I'm not so sure that it's a carb. problem since it runs fine for a
- >short time after starting. Also advancing the timing seems to have helped
- >at least on idle.
-
- hmmm...I'd say a carb prgonosis is a little extreme
-
-
- sounds more like a mass air flow problem (like putting
- a potatoe in the tailpipe.
-
-
- I would try 1 of 2 things first:
-
- 1) obviously remove the air filter and related restrictions
- (sounds simple but I've seen that exact symptoms with
- an excessively clogged intake)
-
- 2) check your catalytic converter (maybe use a test pipe
- to check it). This sounds like the more likely, problem
- as it is probably getting restricted and back pressure
- is building up. Advancing the timing will provide more
- low end torque (with enough firing pressure to overcome
- mild resistance at idling). Try driving it until it dies,
- then wait a SHORT time and drive it again. Keep doing this.
- you should see the performance improve the longer you wait
- as backpressure is relieved.
-
- Overheating may occur when you run with high advance,
- it won't be a major problem, although it may cause some
- similar symptoms
-
-
-
-
- Good Luck!
-
-
- Shawn E. Thompson | Project Engineer/Mgr (716)891-3375
- v087mxgb@ubvms.cc.buffalo.edu | Leica, Incorporated
- University @ Buffalo | PO Box 123
- Graduate School of Mechanical Engineering | Buffalo, NY 14240-0123
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