Question about 1994 Honda Prelude

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Rpms going up and down from 1500 to 3500 in park and drive

1994 Honda Prelude

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Change your idle air control valve tech term IAC.happy holiday

Posted on Dec 22, 2008

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1994 Honda Civic DX I Replaced Idle Air Control Valve Because Idle Was Jumping Up And Down The New Valve Jumps And Down To And when i Disconnect The Valve Car Idles Fine ?


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Jan 09, 2016 | Honda Cars & Trucks

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My sons 83 prelude will idle fine but will fall off sputter and die at exactly 2500 rpms when parked. It also will not cruise down the road easy. If you floor it it will go like crazy. Its either on or off...


Try this. There is a vacuum array on the passenger's side of the engine compartment leading into the box attached to the fire wall. Cap the first tube at the metal tube array with a rubber vacuum tube cap available a the auto parts store. The tube to cap is the one on top, closest to the bumper. I did this to my prelude after looking for the problem for years. It worked and the car runs almost as good as when it was new. The fix is to replace the vacuum switch insid the box on the fire wall, but I have not been able to locate a replacement yet.

Nov 05, 2010 | 1983 Honda Prelude

1 Answer

1994 honda prelude vtec speedometer tach problem


Possible speed sensor. I know the speed sensors are a problem with hondas. A new speed sensor is about $200 and can be easily replaced. It bolts to the top of the transmission on the firewall side. Do NOT buy an e-bay one. They are only about $30 but are junk

Jul 07, 2009 | 1994 Honda Prelude

1 Answer

92 prelude si (auto)


With normal acceleration the 1st to second shift point should be around 2500-3000 rpm. Most of your shifts under moderate acceleration will take place at this same point or when there a light load on the transmission. Under hard acceleration the RPMs will climp higher due to increased power needs and the computer will shift when less power is needed or the RPMs climb to an unsafe speed say5000-6000rpms (depending on where yours redlines). Also going up a steep hill will raise the RPMs higher and goind down a hill will cause a faster shift at lower RPMs. These can always be altered by an individual owner by adjusting shift points, using performance parts and if you have problems (low tranny fluid/trans issues). Your trans RPMS are fine and will vary depening on how your foot accelerates. The shift pattern should be the same every time you drive slow/medium/fast/, look for changes in those patterns you will also catch a problem early.

Jun 14, 2009 | 1992 Honda Prelude

1 Answer

1994 prelude h23 2.3 non vtec 5 spd at start up no cel- smooth idle. under accel it jerks and hesitates but rpms stay solid, however unmoving. strong smell of gas. low power. after driving a few minuted...


Try replacing Oxygen sensor (top of exhaust pipe just rear of engine; 22mm ring-spanner job after cutting wires); though normally comes up with Code 1 on the MIL, this is the right bunch of symptoms.

Jun 12, 2009 | 1999 Honda Prelude

1 Answer

Spits and sputters only at low rpms


electrical issus. have you ever replaced the spark plugs and wires? distributer cap and rotor? might be time to do this routine maintenence.

Apr 29, 2009 | 1985 Honda Prelude

1 Answer

1994 honda prelude problems


http://www.tegger.com/hondafaq/startproblems.html#mainrelay see EFI Main Relay, half way down page

Jan 04, 2009 | 1994 Honda Prelude

1 Answer

1989 Honda Prelude runs at hight rpms until warmed up


check for vacumm leaks or disconnected vacuumm hoses around the in take manifold!

Nov 20, 2008 | 1996 Honda Accord

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