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Thread: 1.8 delay with revs dropping

  
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    mikedes's Avatar
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    1.8 delay with revs dropping

    Recently bought a near immaculate 2002 1.8 Astra Elegance with 23k on the clock. It drives nicely and goes well but when accelerating through the gears the engine revs seem to drop just a little too slowly when taking my foot off the gas to make gear changing sweet. It's only maybe half a second at most but it really makes a big difference. The 1999 1.6 16V it replaced didn't have this problem, anyone else experienced this on the 1.8?

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    badboysracing69's Avatar
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    I think its normal, to keep the revs up whilechanging gear etc. I think mine does it too?
    Cheap Vaux mech at your service in Herts/cambs

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    min had this problem and took it to garage cause it wanted to stall while i was changing gears and it was the idle valve but cause its a mk4 1.8 you cant change this part so had to get new throtle body and once this was done it sorted the problem

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    Thanks for the replies guys, anyone else have any ideas?

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    yea mines like it aswell i.e.

    it holds revs when changing gear so im at say ... 2.5k in 3rd .. clutch in .. revs hold for a second or two ... change to 4th .. clutch ingaged

    job done

    i think (as said above) its normal as it allows smoother gear changes in a hurry (for me anyway)

    wouldnt worry too much about it tbh

    i did find that when i deresitricted the air box and whacked a K&N in the revs were a bit more responsive

    i think its down to the fly by wire throttle or what ever it is

    but as i say i dont find it a problem i think its down to the engine tbh

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    My problem is when accelerating anything other than slowly, if I accelerate up to say 4500 rpm then want to change quickly the engine revs remain too high to change smoothly unless I wait for them to drop. Problem with that is I then lose momentum, this happens right up through the gearbox.

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    Quote Originally Posted by ClarkyG View Post
    min had this problem and took it to garage cause it wanted to stall while i was changing gears and it was the idle valve but cause its a mk4 1.8 you cant change this part so had to get new throtle body and once this was done it sorted the problem
    mine did this, just cleaned my throttle bodies =)

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    Quote Originally Posted by mikedes View Post
    My problem is when accelerating anything other than slowly, if I accelerate up to say 4500 rpm then want to change quickly the engine revs remain too high to change smoothly unless I wait for them to drop. Problem with that is I then lose momentum, this happens right up through the gearbox.
    it keeps the revs up to give you "boost" so to speak, if you do it fast enough from 1st to second or even second to third, your wheels screech as you bang it into gear and it accelerates away!

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    Prob to do with the Drive-By-Wire set up on your engine.

    I hate this with a passion.

    I dont drive my car hard so no probs between gears, but when parking its a a right ballache to get the revs right. Either shuddering or racing engine, makes me look like a right useless driver lol!
    I>< Silver Coupe ><I

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    Must be a way to influence/adjust the way the throttle responds, has anyone had a Vauxhall garage look at the problem?

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