Running issues with '88 Testarossa. | Page 5 | FerrariChat
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Running issues with '88 Testarossa.

Discussion in 'Boxers/TR/M' started by uzz32soarer, Jan 2, 2008.

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  1. uzz32soarer

    uzz32soarer F1 Rookie

    Sep 9, 2006
    3,090
    Melbourne, Australia
    Full Name:
    Robert Hayden
    #101 uzz32soarer, Jul 14, 2008
    This thread has gone a bit quiet, but I'm still here.

    Car is at present in the body shop getting the roof painted and the windscreen channel.

    Dash is at the Doctor being re-skinned.

    Windscreen is here on it's stand waiting.

    All the fuel injection reconditioned equipement is sitting here in a box waiting for the car to return.

    And it's mid winter and bloody cold so I wouldn't be driving it anyway.

    Shall keep you all posted as she goes back together.
     
  2. NZ Ferrari

    NZ Ferrari Rookie

    Jan 5, 2011
    39
    Auckland New Zealand
    Full Name:
    David
    #102 NZ Ferrari, May 23, 2011
    Last edited: May 23, 2011
    Looks like you have sum sort of bad problem with your testarossa my 88 testarossa that i brought in the states last year just before xmas and when i got the car here in nz it had the same problem that it would do some bad jerking at around 60mph but only some times so after pulling all the fuses and relays out i did find some arcing on the fuse blades so after spraying them with some contact cleaner and having a good look at all the contacts and the injection systems and all the vacuum pipes put the car back on the road and runs real good now no problem any more, just a thought on your car have you tried hot wiring the fuel pumps to see if there is a bad wire some where:

    in your last thread you say that you have the windscreen out where did you get your rubber from as i want to replace the one in my car i did order a rubber from a ferrari crowd in the states but thay sent me the stainless moulding instead and i'm have a battle with them for the rubber : David
     
  3. uzz32soarer

    uzz32soarer F1 Rookie

    Sep 9, 2006
    3,090
    Melbourne, Australia
    Full Name:
    Robert Hayden
    #103 uzz32soarer, May 13, 2014
    Thought it was high time to chime in here and close this chapter. I persisted for another two years to try and locate this issue which was getting worse. One day the exhaust started sounding really ordinary and it was getting hotter around the back of the car.

    I purchased a small digital laser thermometer and started taking various readings from around the engine. One day after a 'spirited' drive I came home and found that one side of the engine was much hotter than the other side. I parked the car up for a few months and then decided that it was time to check some things out again.

    I found that the valve timing was out on one bank. The car was overdue for belts (5 years) so in it went to have belts done and also have valve clearances set.

    The mechanic found that one belt had jumped two teeth and valve timing was substantially out and also the valve clearances weren't too good. The lovely Bell exhaust was stripped down and was found to be totally burnt out internally from massive heat loads. This was fully rebuilt, belts and timing was done and all valve clearances were done.

    The result............runs like a bought one. No more surging and good power across the rev ranges with no added heat spots.

    Worst thing was 700km later it did the diff!!!!

    Opinions vary, but it's possible that when the belts were done last in the UK just prior to collection, the shop 'may' have got the timing a little off on one side.

    Then I've done 20k kms in the poor old girl and at some time given it a big rev and jumped a tooth putting it two teeth out. That's when the symptoms changed and allowed me to locate an issue.

    I was pretty sure that I had checked timing using the marks on the rear of the timing pulleys, but clearly it wasn't obvious until it jumped the second tooth.
     
  4. SBDaytona

    SBDaytona Karting

    Jul 13, 2010
    69
    #104 SBDaytona, Jul 24, 2015
    For those of you trying to diagnose a problem with a car showing this condition (intermittent light throttle hesitation). I had identical symptoms with a car that had been to several shops to get sorted. To cut a long story short - we found that the light throttle hesitation was caused by a timing belt being out one tooth on the LH Bank Inlet Cam. It was hard to see on the external timing marks as the alternator and other kit make it hard to check the marks accurately (a bore scope camera helps). The compression was uniformly down on the LH Bank relative to the RH Bank (late inlet valve closing so less charge to be compressed). When we pulled the engine it was very clear the cam timing was out. Not sure if the belt slipped a tooth or was installed incorrectly. Whatever the case the belts were far too loose so it was just as well we did the belt change when we did. They must have been installed loose and as many of you will know the tension is fixed once the belts are installed.
    We had to retune the car after it all went back together as several folk had fiddled with the Bosch KE Jetronic fuel injection system in an attempt to dial out the running issues.
    Hope this helps someone out there with some of the frustrating running issues that can plague this fabulous cars (usually down to poor work rather than the cars themselves).
    Best wishes
     
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