Tune up...or what???
Thread Starter
Drifting
Joined: Oct 2001
Posts: 1,444
Likes: 4
From: Hawthorne NJ
Tune up...or what???
1989 L98 Coupe, tuned up a little over a year ago (7K miles +-) babied, but daily short run driver, ran fine til yesterday. Starts, idles fine, but if you give it gas it stutters, not hesitation but more like missing. It's got new( 1 year ago) wires, platinum+ plugs, new ign. module, cap, rotor,TPS set @ 56. Can't give it gas except if you feather it, even then it doesn't run "clear." Replaced the fuel pump 2 years ago, fuel filter, new injectors, one year ago.
Any educated guesses?
Thanks.
Any educated guesses?
Thanks.
Melting Slicks
Joined: Jun 2004
Posts: 3,032
Likes: 4
I'm not sure... I'm sure someone will correct me if I'm wrong:
but isn't that a little low for a TPS setting?
seems like your symptons would indicate that is the problem (i.e. slow response from throttle)...
just a guess though...
but isn't that a little low for a TPS setting?
seems like your symptons would indicate that is the problem (i.e. slow response from throttle)...
just a guess though...
Thread Starter
Drifting
Joined: Oct 2001
Posts: 1,444
Likes: 4
From: Hawthorne NJ
TPS setting is as per manual, besides it hasn't changed and it ran well for 1 year. Checked plug wires and connectors, they seemed fine but didn't have time to pull plug yet.
I'll keep trying. Thanks.
I'll keep trying. Thanks.
Race Director
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Originally Posted by SunCr
Maybe the MAF or MAF Relays. Disconnect it (the MAF) and see if it runs any better.
Just a thought
Fuel pumps can go bad and filters can get clogged. Company just biught me a brand nee ford 150 (UGH) and it stranded me twice with less than 100 miles on it, it was the fuel pump
seeya
Advanced
Joined: Jul 2004
Posts: 56
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From: Perkiomenville PA
Have you figured this one out yet? I've got the same problem on my '89. Started about a week ago, and I havn't had time to start troubleshooting. Hopefully this weekend. The only thing I can add is that the problem is worse when trying to accelerate up any incline. I too have new wires, plugs, rotor, and cap installed a month or so ago. I need to check the fuel pressure, and filter though.
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Safety Car
Joined: Aug 2002
Posts: 4,812
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From: New Albany IN
St. Jude Donor '03-'04-'06-'08-'09
Another vote for possible Fuel Pump....check the pressure and see what it is.....Mine ran but bogged everytime you tried to give it gas...it even started stalling at stop lights. So, it can still put fuel out, but less than is needed by your car.
Cruising
Joined: Nov 2004
Posts: 11
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Originally Posted by weo89vette
Have you figured this one out yet? I've got the same problem on my '89. Started about a week ago, and I havn't had time to start troubleshooting. Hopefully this weekend. The only thing I can add is that the problem is worse when trying to accelerate up any incline. I too have new wires, plugs, rotor, and cap installed a month or so ago. I need to check the fuel pressure, and filter though.
Racer
Joined: Sep 2004
Posts: 323
Likes: 1
From: Muncie Indiana
Won't Run
Nobody with the problem said if they had just filled up with gas and this started to happen. I have had this in the past and found it to be a bad tank of gas. Car or Motorcycle would not run and could hardly maintain the speed limit. Sometimes putting a couple of cans of dry gas in helps but usually you will get really bad milage and as soon as you need a half tank or more of gas fill it up and drive it about 20miles and see if it clears up. 