Question about Toyota Supra

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My 1JZ Vvti struggles to start - cranks fine but only starts sometimes when primed (ignition off to on process)

Have replaced battery, fuel pump and new spark plugs.

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  • Toyota Master
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No year, way a shame. 1jz what, there are 3. ge,gte,fse
24valve, DOHC , got twin turbos?
inline 6 , 2.5L (unknown target country or EFI used)
do the 60k mile tune up.
(ignition off to on process) huh? bad starts , ( i do a battery of tests ) here is a stupid list. (can do 50)
LOL what a pun, battery not low? (a battery of battery tests? LOL.
no year, makes answers SUPER HARD so guess at 96+
ever run a scan tool on it, see if DTCS are there? if not; why not?
1: never tuned up, this decade or last 60k mile marker.
2: ISC sticking close, starves air and goes rich floods.
3: low fuel pressure
4: leaking or clogged (full or partial) injectors
5: ECT reads wrong, so fueling is wrong
6: flooding for many reasons.
7: weak compression on 1 or more cylinders.
8: leaking head valves.
9:cam belt slipped, see low compression x 6
10: spark parts bad, or timed wrong.
11: scan it, scan it scan, it.... but no year so cant help you.........

nor country stated.. EFI works different in each country
not the basics but how to SCAN>
nobody here ever posts country cept, 2 in 4500 posts..... amazes me...

Posted on Jan 03, 2014

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SOURCE: My 2000 Oldsmobile Alero does not start. It cranks

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it could also be the car alarm the immobiliser shutting of the ignition ""stops it getting nicked?"
try resetting the alarm if you take off pipe to carb and there is fule pumping out!!! fule filter is "ok" for starting up on!!! take care working with fule!

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