Slight hesitation
Slight hesitation
I have a base Vibe - 5spd. When I accelerate hard (pedal to the floor) and run the engine up to redline in the gears, I sense along the way up the RPMs a couple of very slight, but obvioulsy noticeable, hesitations in the engine, like a little tiny hiccup. It's more noticeable in first and second gear. Does anybody else experience this and/or know what's wrong? Or is this normal?Thanks!
Re: Slight hesitation (iburgess)
I've noticed it, too. It seems more noticeable with the A/C on, but that just might be my imagination. I noticed it the first time when I had used some cheaper gas, but again, that just might be my paranoia kicking in. I've gone back to only top-brands of gas. - Earl
- Earl Earl Jones, Sales and MarketingHorizon Systems LLChttp://www.horizonsystems.com/ Skype ID: esjonesMy Vibe: '03 Base, 5-speed, ABS, Alum. Wheels, Power Pkg, DVD Nav., Security, Neptune/Graphite
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viberations
- Posts: 45
- Joined: Wed Jul 03, 2002 10:27 am
Re: Slight hesitation (esjones)
I noticed the same thing, what it is if a/c is on is compressor for a/c kicking off causing a burp
PJV TOYOTA DEALER ROCHESTER N.Y
Re: Slight hesitation (iburgess)
I've also noticed it, but it doesn't seem to matter if the ac is on or off. Could be just dips in the torque curve, or the ecm retarding the timing due to it sensing knock from low grade fuel. I almost always buy the cheap stuff, so maybe next tank I'll try premium again and see if it still does it.
Sold 6/16/04 03 Vibe 5-speed, Hotchkis Sway Bars & Springs, Hooker Aerochamber, Panasonic Stereo, Hitch, Silverstars,04 Saturn Vue 2.2L Ecotec, 5-speed, 01 Stratus R/T Coupe 5-speed (wife's car) 85 Corvette 268 CompCam, 882 heads, FlatTops, 24lb injectors, Hooker Aerochamber true duals, 58mm TB, Holley AFPR, Siamesed intake base, Polished TPI.
Re: Slight hesitation (silverawd26)
quote:Maybe it is the rev limiter kicking in? No, I've noticed a "dip" around 3k. The rev limiter wouldn't kick until into redline.
Sold 6/16/04 03 Vibe 5-speed, Hotchkis Sway Bars & Springs, Hooker Aerochamber, Panasonic Stereo, Hitch, Silverstars,04 Saturn Vue 2.2L Ecotec, 5-speed, 01 Stratus R/T Coupe 5-speed (wife's car) 85 Corvette 268 CompCam, 882 heads, FlatTops, 24lb injectors, Hooker Aerochamber true duals, 58mm TB, Holley AFPR, Siamesed intake base, Polished TPI.
Re: Slight hesitation (silverawd26)
quote:Is that with the CAI installed too?Ya, seems to still do it.
Sold 6/16/04 03 Vibe 5-speed, Hotchkis Sway Bars & Springs, Hooker Aerochamber, Panasonic Stereo, Hitch, Silverstars,04 Saturn Vue 2.2L Ecotec, 5-speed, 01 Stratus R/T Coupe 5-speed (wife's car) 85 Corvette 268 CompCam, 882 heads, FlatTops, 24lb injectors, Hooker Aerochamber true duals, 58mm TB, Holley AFPR, Siamesed intake base, Polished TPI.
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SkateForLife86
- Posts: 41
- Joined: Wed Jun 11, 2003 10:34 am
Re: Slight hesitation (silverawd26)
when does the rev limiter kick in on a 5speed base model? 6000rpm, 6500rpm....? thanks
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Re: Slight hesitation (SkateForLife86)
On my base 5 speed, the limiter comes in at 6,400. I too feel the occasional little hiccups on the way to redline. Sometimes they're more noticeble at part throttle. I think that perhaps the variable cam timing shifts in steps, rather than continuously; or it could be some minor imperfections in the fuel or spark calibration. I've never used Premium fuel, guess I should try a tank and see if affects power or the "hiccups"One of these blips seems to occur at over 6,000 RPM, and I have the feeling the car would be a bit faster if it could be shifted at say 6,800, thus ending up on a fatter part of the power curve after the shift. Guess I won't find out until/unless someone comes up with an inexpensive ECM reflash or whatever it takes for the Toyota computer...