11 replies to this topic

[WhoreMouth_Jr]

So i dropped a jza70 jz into my x7 over the past couple of weeks. I got it running the other day and have just been finishing up the final touches. It ran perfectly fine last night after i fixed the last gas leak.

Ran last light before i wired up my fan and clamped the fuel filter to the block. I already undid what i did to the fan and still no luck.

It started up quick and easy the past couple days, but this morning it just cranked and cranked and cranked and nothing. I tried to add gas still didnt change anything.
I double and tripple checked all my wiring. My grounds look to be good.


I finally got it started by jumping it but it runs real real low like lower than 500 rpm and the check engine light is on. Sounds like its down cylinders or something running super bad and doesnt really want to rev or stay running.

I leave for the mainland tomorrow was hopping it was running good so my family can just drop the car off at the docks but now im having this problem.

Any help would be great!

thanks in advanced

Jordan

[Foompla]

does it rev when it starts?

[Gibbs]

Hmm maybe check your battery cables for good contact connection and check fuel pump and all sensors

[WhoreMouth_Jr]

plugs where mega black.. probably from running open manifold because my DP didnt fit yet. And i let it run a little bit to make sure everything worked >.<

[WhoreMouth_Jr]

just kidding tried to drive it this morning it didnt want go go about 2k rpm before it got mega rough...

fuck

[Foompla]

check to see what the spark looks like mang.

[WhoreMouth_Jr]

its just weird how it worked fine one night then the next morning it didnt even want to start...
idk gonna check spark and maybe disconnect the IC piping to see if its something vac related

thanks

[WhoreMouth_Jr]

BTW is this a one way vacuum link kinda like in the brake booster?

Because i broke it kinda like this guy during my swap and replaced it with just a straight line and now that i got my piping all hooked up it run under any kind of load


Kinda circled in red

[zokustyle]

Gerard's old 1J that's in Kevin's car ran just fine with that thing broken. IIRR, it's something for the recirc valve.

Are you using the plugs that came in the engine?

[WhoreMouth_Jr]

i pulled um and they were black replaced them with ngk bkr6e's or what ever i started it up and it ran fine for 10 seconds. Went to drive it the next morning still not making power under boost.

kinda puzzled
im gonna try disconnecting the IC piping and see itll run smoother

[iheartMX83]

wait. are the new plugs black now ? gap them ? are your coilpacks all cracked and arcing ?

having bad grounds on a jz motor will cause problems with no start, and fouling plugs. put some grounds from intake to body of car and back of head or from turbo to car. did this once on a car that the dude powercoated and it fired right up. car was just fouling plugs like mad it was like the injectors stuck open. make sure you didnt put the block ground in the rusted ass block hole or something.

[WhoreMouth_Jr]

ill give it a try.
its would be like instantly fouling plugs because it ran for less than a minute with the new plugs gapped to .8ish and the plugs didnt look cracked at all.
also got a ground from head to block and and my ran better before i connected.
ill double check thanks again