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1990 nissan has sputtering problem in low rmps
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koryguin
New User
Mar 25, 2012, 10:37 PM
Post #1 of 5
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1990 nissan has sputtering problem in low rmps
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1990 nissan 300zx, v6 24 valve non turbo has 85000 miles on it. the car sat for 2 years with out being started i've replaced the spark plugs fuel filter also had a resent oil change and has a brand new battery. the nissan has dual cat back exhaust and no cat. i'm wondering if the problem could be a sensor?? mass flow went bad possibly any ideas
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nickwarner
Veteran
/ Moderator
Mar 26, 2012, 4:40 PM
Post #2 of 5
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Re: 1990 nissan has sputtering problem in low rmps
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Have you tried to get the codes pulled? There are a lot of things that can cause this issue and the magic eight ball broke about 3 weeks ago (have a pool going to get a new one asap) so some codes would help. By the way, sawzalling your cat off isn't exactly a good idea for the car or for the EPA and their itchy ticket fingers.
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Discretesignals
Ultimate Carjunky
/ Moderator
Mar 26, 2012, 5:24 PM
Post #3 of 5
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Re: 1990 nissan has sputtering problem in low rmps
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Wonder what the gas smells like after sitting around for 2 years? I'd be running bad too if I was sucking up wine smelling stale gasoline/ethanol.
Why do people do saw off the cats? I bet 3/4 of the ones that are sawed off aren't plugged. A simple back pressure test would of told you if you had an exhaust restriction.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Mar 26, 2012, 5:26 PM)
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nickwarner
Veteran
/ Moderator
Mar 26, 2012, 7:05 PM
Post #4 of 5
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Re: 1990 nissan has sputtering problem in low rmps
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Thats why we have job security DS. Too many people think cats rob horsepower based on faulty logic. They heard the old timers say the things are junk and make your car gutless. They don't realize that is in reference to cars in the 70's and earlier 80's when the technology just wasn't there to make power with emissions equipment. Those cats were heavy, expensive and inefficient. They choked your exhaust flow off. So people cut them out, the car had more power and the cat was deemed junk. The technology has evolved and now cars actually make no more power with them than without. I saw a demo on a dyno once to show how well the cats we have today flow. The engine they were testing actually made 3 MORE HP with the cat than without. While its not like the cat is a performance item, the intent of that demo was to show that performance and emmisions can exist in harmony without major drawbacks. Look at the E-Rod crate engine. Makes nice power, stand-alone EFI, ready to drop in your hot rod project in your driveway and with a CARB EO number. We've come a long way in 40 years.
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koryguin
New User
Mar 27, 2012, 11:29 AM
Post #5 of 5
(1453 views)
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Re: 1990 nissan has sputtering problem in low rmps
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i have not, no engine lights popped up. 5 tanks of premium gas have been ran through the car.
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