Sputtering at 55-65 mph
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Freshman User
Joined: Sep 2007
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From: Va.
Sputtering at 55-65 mph
I'm borrowing my dad's ride. It's a 1990 bronco II. He told me it sputters at about 55-65 MPH & he wasn't kidding. It's like the motor quits for a split second. Any ideas what would cause this? I'd like to fix it for him in return for him loaning it to me. Thanks.
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Freshman User
Joined: Sep 2007
Posts: 35
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From: Va.
Yeah, Well I'm sure it could be any of those but it's in very good shape for a 1990 & the old man is very particular about his rides so I think I could rule out several of those. I was just wondering if anyone has had this happen to them before & had it be something that you wouldn'd expect.
Former Vendor
Joined: Mar 2009
Posts: 8,098
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From: Westford, MA
Yeah, Well I'm sure it could be any of those but it's in very good shape for a 1990 & the old man is very particular about his rides so I think I could rule out several of those. I was just wondering if anyone has had this happen to them before & had it be something that you wouldn'd expect.
I've had bad wires right out of the box before,it's very possible.
Hope this helps,
T
Elder User
Joined: Dec 2007
Posts: 739
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It could need a decent tune up. I'd be more suspect of a bad TPS (Throttle Position Sensor) Normally this will kick up if the truck/car has a lot of cruse control miles on it. Dead spot in the TPS will make the computer get bad info, and can do a number on how well it drives.
If you're good with a multi-meter? TPS is very easy to test.
S-
If you're good with a multi-meter? TPS is very easy to test.
S-
Junior User
Joined: Oct 2008
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I had a similar problem on mine, and it ended up being a bad fuel pump. Could always just have the fuel pressure tested and rule that out.
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Posting Guru
Joined: Sep 2004
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From: Yokosuka, Honshu, Japan
Is it a manual or automatic? If you only notice it at that speed range, I'm almost willing to bet you need to pull diagnostic codes and run a vacuum test. I'm almost willing to bet that if the catalytic converter has never been changed on it, and the truck has over 100K miles on it....
Outside of that, pull diagnostic codes, do a wiggle test on all the engine wiring harness connectors, check ALL of your ground connections.....
Outside of that, pull diagnostic codes, do a wiggle test on all the engine wiring harness connectors, check ALL of your ground connections.....
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