I know all about fuel problems being diagnosed as electrical problems.A friend of a friend brings this old clevo powered XY shaker around the other day after several people had given up trying to fix a miss it had between 5500 and 6000rpm.It would go really hard to 5500 and start to miss and around 6000rpm it would clear and rev clean to 7800.I staight away think electrical.The electrics were standard and the guy wanted to upgrade so i fitted a regraphed igniter bosch dizzy,decent coil,leads and check that its getting good voltage and fit some colder plugs.It went better but still had the miss.He had just fitted a big carter pump and 1/2" lines so i thought it should have enough fuel and the plugs looked like the mixtures were good.Just to be sure i borrowed a fuel pressure reg and sure enough it would loose pressure right where the miss was.A bigger needle jet fixed the problem.I went back and had a look at the old plugs and noticed even though the mixtures looked good there was a blue hot spot on them.I bet if i did a plug chop on the miss it would have indicated really lean and would have save all the mucking around.Its going hard now and the guy was happy to fork out for the dizzy anyway as it saved him from replacing the twin points all the time and the regraph stoped some pinging it had around 3000rpm.Its been a few years since ive driven a shaker and there still a real handfull.Maybe a good drift car for superman.
Terry Rudd wrote: > Dave, > > You'd be surprised what a fuel problem can or cannot let you do when an engine is > concerned! - I'm just sayin' never discount fuel supply when looking for this type > of problem. I've had engines behave very normally in most circumstances but the > "going up hill" as both the ign & fuel systems are under the max load possible and > for a considerable duration. > > regards > Terry > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of David Andrews > Sent: Friday, 1 August 2003 5:09 PM > To: [EMAIL PROTECTED] > Subject: RE: Wierd and annoying ignition breakdown > > Terry, > > Thanks. If it is the fuel then its weird. It'll quite happily rev out in > all three first gears when just warm (and this is with an SC14 > supercharger and an L28). So if there was something with the fuel i > would've thought it wouldn't let me do that. > > Dave > --membersozdat------------------------------------------------------- OZDAT Mailing List Please Note:- Send (un)subscribe requests to [EMAIL PROTECTED] Send submissions to [EMAIL PROTECTED] No unauthorised redistribution of this email http://www.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/[EMAIL PROTECTED]/ ---------------------------------------------------------------------
