Toymods Car Club Inc: Tech & Conversions => 1JZ misfiring finally fixed -PLEASE JOIN IN "LETS TALK TIMING"

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celicamad
Forums Junkie

Location:
newcastle
Registered:
June 2002

Re: 1JZ misfiring finally fixed -PLEASE JOIN IN "LETS TALK TIMING"	Sat, 15 May 2004 23:55

Chris i assume you had ALL the injectors cleaned . if not jason may be right could be a lean out . maybe do a fuel flow test too .drop the return line off and run it to a bucket .turn the ignition on until your fuel pump runs . then you should have around 2 litres in 60 secs . time it so its acurate . any less id check filter first then redo test and if not .whack in a walbro pump (in fact id install a walbro anyway). if you can pull 2 litres/min without the car running then .youll get a little more with the alternator running. But 2 litres is a rule of thumb for boosted 1j with ic and exhaust But i have also heard 1js doing this with fouled plugs before so id do as already suggested . try the bkr6eS the s is for steel dont buy v groove copper plugs .try gapping to 0.7mm The only other thing as you have already suggested is coil pack but they normally break down under all sorts of load conditions . But its still worth checking we are definatley not just talking about a boost cut here are we . i realise it would a lot more than just pop .but just wanted to confirm anyay mx 83 toy mate i realy wouldnt mess with fuel mixtures and timing unless your on a dyno with a a/f meter up its butt. as you change timing af ratios can be effected so its all related as to what mods we have done before . well yes add a little timing and lean of the raios 12:1 sounds fine but if you must then yes adding small amounts of timing gives good gains particulary to the mid range of a 1j . however your still running factory exhaust and (correct me if im wrong) Cressida fuel pump . The factory Cressida fuel pump is NOT good enough for a boosted modified 1j i have heard of a few people getting away with them but they are usually only making moderate horsepower the flow tests on my old pump . showed only enough fuel for about 150 kw @wheels which was 1.5 lpm with the safc timing mods and exhaust your likely to get just over 200kw (auto) So my advice firstly (if you havnt already) install walbro pump) then open up the exhaust before you do anything else this will give the biggest gain of all first things first . as soon as you put on the exhaust then youl have to re-tune anyway Then whack it on the dyno . If you bring up to Newcastle again you can do it all on scotts dyno and ill tune the Boost controller for you at the same time [Updated on: Sun, 16 May 2004 00:17] [Report message to a moderator]

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