Honda Prelude UK

rob394 · Lude Obsessive Joined: 17 Aug 2009 Posts: 285

ok got the car back on the road 2day after a week. and the speedo just randomly jumps when u r driving. say im doing 30 it will say 30 on the speedo but then it will just go 2 120 or 180 or 50.

what could this be??

bootyinspector · Posted: Fri Oct 23, 2009 7:01 pm Post subject:

When you're speedo makes massive upwards jumps beyond normal vehicular behavior they call that VTEC. Laughing

It's nothing to worry about...

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My Car, Alphanumerically: 1992 JDM BB1 2.2 Si VTEC 2.2 DOHC with M2B4 LSD and 4WS in NH-552M.

rob394 · Lude Obsessive Joined: 17 Aug 2009 Posts: 285

hahahaha nice 1 i like that. unfortunately it wont go from 30 to 160 in 2 seconds im affraid

rob394 · Lude Obsessive Joined: 17 Aug 2009 Posts: 285

anyone had this prob b4??

Shiny · Posted: Sat Oct 24, 2009 4:29 pm Post subject:

I did with the Accord, but with the rev meter, when i replaced the ICM.

Turned out to be a poor connection on one of the wires so cleaned up, clamped and sorted.

Not sure where the speedo gets it's readings from though.

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rob394 · Lude Obsessive Joined: 17 Aug 2009 Posts: 285

oh rite . well just statred doing it yesterday. Sad

im puzzled

novakp · Posted: Mon Oct 26, 2009 6:53 am Post subject:

I have the same problem with my speedo...It will stay on 40 and than suddenly drop to 20 and in a second comes back to 40 Confused

It has to be a loose connection or it is loosing an output signal from somewhere....to be honest I do not know how to bite that to get resolved Confused

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BB1(1992) to BB4(1996) gone through everything...

pezking · Posted: Mon Oct 26, 2009 1:32 pm Post subject:

Loose connection at the VSS perhaps?

When the rev counter does it, it's usually a bad connection to the distributor.

Lude-Dude · Posted: Mon Oct 26, 2009 3:24 pm Post subject:

maybe a clue to the idle fault, could be electrical

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98 Prelude 2.2 Vti 5g
UKDM - H22a5

rob394 · Lude Obsessive Joined: 17 Aug 2009 Posts: 285

how would the 2 interfear with each other?? dont no if its electrical as when the car does go pear shaped on idling like for instance 2day it was idling at 2000rpm. if i quickly blip the throttle the idle then returns back 2 normal again

Lude-Dude · Posted: Mon Oct 26, 2009 8:22 pm Post subject:

that sounds to me like fitv, I had same problem when I installed a throttle body without one.

clean or replace it maybe

could be the speedo needle thats shagged, could be the vss best to check the loom really

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98 Prelude 2.2 Vti 5g
UKDM - H22a5

rob394 · Lude Obsessive Joined: 17 Aug 2009 Posts: 285

well luckily i brought a gearbox with a vss on it already so when the vox goes in ill use that 1 aswell.

my fitv is sucking in air when hot and it shouldnt but when i put my finger over the hole it still idles high and the revs dont drop.

hammerbeirne · Newbie Joined: 11 Nov 2009 Posts: 8

pezking wrote:

Loose connection at the VSS perhaps?

When the rev counter does it, it's usually a bad connection to the distributor.

Whats a vss and where is it located

mnaylor · M.O.T Fail Joined: 11 Jan 2007 Posts: 88

I had a similar problem with my last prelude but it was the rev needle. It was not the connection to the dizzy, it was the dials themselves. I bought a second hand set of dials from someone on here, swapped them over and all was well Smile

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UK 4th Gen 1995 2.2 Prelude