hmmmm just as things seemed going well for the Lm
it has now developed a major fault and i may not be able to attend the ace cafe night! The car has been running perfectly well last thursday and friday, but
on Saturday just gone took her out in the morning and drove her about 12 miles reached perfect operating temprature and stopped at a petrol station and filled
her up, then went to start the engine and the starter motor spins ok and the fuel pump engages when you put the ignition on but the engine did not fire up!!!
after leaving her about 10 -15 mins it then started!! so i drove her home thinking its got a hot start problem and it done it again later that day again after
engine has been run for a time so you would think it is a hot start problem however, tried to start her up sunday morning (stone cold engine) and again starter
motor spins, plenty of juice in the battery and again will not start! tried it 4-5 times on sunday and its not having none of it!. Martin the chap who has
restored the car came round sun night, with a volt meter and we did some checks, the fuel pump is working fine, there is current going to the distributer,
there is power going to the fuel injection, and there is a spark. after trying to start the engine we took a spark plug out and it was bone dry, so......
fuel problem or could it be the ECU? at this moment in time i am arranging for an auto electrician to come and have a look and depending on the fault or if it
needs a new ecu i could be looking at a long time getting replacement parts as the engine is chevy L98 engine (not a LS1) as i thought, its a 1988-1991 engine
and as Cor Eusor has also modified it, its going to be very difficult to source a replacement ECU if its the problem? other possible option is a brand new
engine upgrade? but after spending £££££s on the body/interior i do not really want to go down this road
LM600 engine trouble looking grim for Ace cafe!
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 boycey |
LM600 engine trouble looking grim for Ace cafe! |
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Registered Member
Posts: 204 Mon, 8-Jun-2009 12:22 |
hmmmm just as things seemed going well for the Lm
it has now developed a major fault and i may not be able to attend the ace cafe night! The car has been running perfectly well last thursday and friday, but
on Saturday just gone took her out in the morning and drove her about 12 miles reached perfect operating temprature and stopped at a petrol station and filled
her up, then went to start the engine and the starter motor spins ok and the fuel pump engages when you put the ignition on but the engine did not fire up!!!
after leaving her about 10 -15 mins it then started!! so i drove her home thinking its got a hot start problem and it done it again later that day again after
engine has been run for a time so you would think it is a hot start problem however, tried to start her up sunday morning (stone cold engine) and again starter
motor spins, plenty of juice in the battery and again will not start! tried it 4-5 times on sunday and its not having none of it!. Martin the chap who has
restored the car came round sun night, with a volt meter and we did some checks, the fuel pump is working fine, there is current going to the distributer,
there is power going to the fuel injection, and there is a spark. after trying to start the engine we took a spark plug out and it was bone dry, so......
fuel problem or could it be the ECU? at this moment in time i am arranging for an auto electrician to come and have a look and depending on the fault or if it
needs a new ecu i could be looking at a long time getting replacement parts as the engine is chevy L98 engine (not a LS1) as i thought, its a 1988-1991 engine
and as Cor Eusor has also modified it, its going to be very difficult to source a replacement ECU if its the problem? other possible option is a brand new
engine upgrade? but after spending £££££s on the body/interior i do not really want to go down this road
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socramsnalla |
#1 | |||
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Registered Member
Posts: 378 Mon, 8-Jun-2009 16:11 |
   £££££££££
Sorry to hear your tales of Woe Boycey. So looking forward to seeing the car at the weekend. Really hope you and the car can still make it. |
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boycey |
LM600 | #2 | ||
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Registered Member
Posts: 207 Mon, 8-Jun-2009 19:50 |
well the latest seems that either the crankshaft sensor is faulty OR looking at a new ECU. The car actually started again today so we immediatley turned the
engine off and tried to start her again and again the car would not start?????? we tried to start the car 3-4 more times and it does not want to know so god
knows!!! you can imagine after 7 months of intense caring and finally getting her ready this now happens and kinda knocks the passion for this car a bit so i
will wait and see.
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The Quiffster |
#3 | |||
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Registered Member
Posts: 3442 Mon, 8-Jun-2009 21:34 Administrator |
Boycey, very sorry to hear about the intermittent engine problem. Can understand you feeling a bit hacked off at the moment (been there myself many times over
the last three years, although perhaps not with the same outlay!), but looking on the bright side, it still looks fantastic even when it's stationary!
 . I very much hope your auto-electrician identifies the problem & you don't have
to source another ECU. Best of luck with tracing the problem, & keep us all posted.
The Quiffster
Unregistered user?, Why not come in out of the cold? It's painless, free and opens other options up to you. Spare less than a minute of your time and register here, go on, you know it makes sense! |
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cazzer |
#4 | |||
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Registered Member
Posts: 879 Mon, 8-Jun-2009 23:05 Chief mechanic |
Yer in my territory now mate
Worst case scenario, get an omex 710 and program it yerself. Its not hard and you can get one for about £900. A new short loom from yer auto electrician should be about 200 quid. Get a perfect map for the engine. (unless its the crank sensor then its 20 minutes work and 50 quid) Either way....no disaster. You definately dont need a new engine. |
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boycey |
Lm600 update | #5 | ||
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Registered Member
Posts: 210 Tue, 9-Jun-2009 15:16 |
 Thanks Quiff and Cazzer
More detection work and this particular engine does not have a crankshaft sensor!! its all done on the distributer, so today i have driven to Kent where there is a Chevrolet dealership and have got a complete new distributer and ignition module we think its the ignition that is the problem not the ECU? tomm morning i will know. Gaz shocks are going to make a brspoke set of front/rear shocks as the ones on the LM are shot it just rides on the springs (feels like its on a mattress!) but its driveable, these new ones will be on in 3 weeks time (ready for Curborough) they will be adjustable and will make a massive difference to how the car drives it still goes very well but it lacks the sharp pointy nose feel!. All things crossed that its the ignition thats causing the problem if it is not then ECU time! so at this stage Ace cafe 50/50 if it will make it! 
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Martyn123 |
#6 | |||
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Registered Member
Posts: 121 Tue, 9-Jun-2009 22:52 |
Hi Boycey,
Re your springs being shot, I recently spoke to Koni re mine and a couple of their approved service agents both told me that if they are left just sitting there on a car without any movement for a period of time then they will go off, hence the reason why I am not going to get mine serviced until the very last moment before the car is finished. Did you not say previously you were taking the car to Topcats for setting up ? interested in this as I will need a proper set up myself eventually. Hope you can make it to Curborough, did not realise that your were intending to take it there http://www.youtube.com/watch?v=LffEy8Va3yo is the sound to beat !! Regards, Martyn......... |
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boycey |
LM600 engine trouble | #7 | ||
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Registered Member
Posts: 211 Wed, 10-Jun-2009 12:03 |
Hi Martyn the new shocks and springs are getting made by Gaz shocks ( as on richards p mantis) and on my old LM400 these are very good and will take about 2-3
weeks to manufacture as not the same set up as on the mantis and 400/500's. At the moment i cannot get the car to top cats i think it really needs to go
to a chevy engine tuning specialist with a rolling road rather than top cats as top cats do not use the same engine as in the Lm600. Still no further forward
in the mysterious non start problems, could be low fuel pressure? need a fuel pressure gauge tio test this ( cant get one anywhere!!) if its not that then its
the ECU so very unlikely i will be joining you at the Ace now and depending on availability etc and importing from the usa this could be 6 weeks!!!!!! i may
not even make the 50th yet!!!
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boycey |
engine | #8 | ||
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Registered Member
Posts: 214 Wed, 10-Jun-2009 16:19 |
 Got a mobile engine diagnostic chap coming
saturday morning to have a look and to do a pressure test on the fuel injection also, could be lack of pressure in the fuel rail causing the ECU to shut down
as a safety feature? so may just need a new fuel pump? if this is the case i could still be at the Ace sat night, i will try my best!! but if it is the ecu i
can now get one from a dealer within about 1 week so all is not lost just teething problems, to be expected really as ther car had been unused for about 4
years in Cor Eusors work shop!!!! explains the faulty shocks also.
Last Edited By: boycey Wed, 10-Jun-2009 16:25.
Edited 1 time.
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The Yellow Beryl |
Stick with it! | #9 | ||
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Posts: 12 Thu, 11-Jun-2009 23:55 |
Boycey - you are a gnat's crotchet away from making a thing of ultimate automotive beauty. Been away for a week and just picked up the threads re. shocks
and (partic.) non-start, and I'm almost crying, so god knows how you must be feeling after 7 months of gestation. Keep smiling and don't let it take
the gilt of what you have achieved - the ultimamarcos! If it doesn't start for Prescott will come over and push it myself- you gotta be there.
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brian coleman |
Stick with it! | #10 | ||
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Posts: 221 Fri, 12-Jun-2009 06:22 Apprentice mechanic |
I'll second that
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The Quiffster |
#11 | |||
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Registered Member
Posts: 3448 Fri, 12-Jun-2009 20:11 Administrator |
Boycey, please post Saturday as soon as your sparkie is finished. I'll be checking the Forum for updates!
The Quiffster
Unregistered user?, Why not come in out of the cold? It's painless, free and opens other options up to you. Spare less than a minute of your time and register here, go on, you know it makes sense! |
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The Quiffster |
#12 | |||
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Registered Member
Posts: 3449 Sat, 13-Jun-2009 11:43 Administrator |
Does no news = Good news? I am hoping so! Just leaving Manchester, so... maybe I'll bump into an LM600 at West Wycombe Park (not literally... or there may
be trouble!
 )
The Quiffster
Unregistered user?, Why not come in out of the cold? It's painless, free and opens other options up to you. Spare less than a minute of your time and register here, go on, you know it makes sense! |
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boycey |
IT MADE IT! | #13 | ||
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Registered Member
Posts: 218 Sun, 14-Jun-2009 16:23 |
Well as some of you saw the LM made it, and got me home, it did not miss a beat! i am so glad i went for it as i really did not want to let any of you down
hope you all thought it was worth it, within about 3 weeks will see her properly sorted, ie rear diffuser yet to go on, new shocks/springs and engine tune up.
BUT back on this thread the pictures will be posted soon!!
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socramsnalla |
#14 | |||
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Registered Member
Posts: 381 Sun, 14-Jun-2009 16:50 |
Brilliant Boycey! Saw it at the Ace last night. It deserved pride of place.
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