Deleting 1j P/S Idle up valve?

**Z2TT** · 13-02-2011, 04:20 AM

Hi Guys,

I've got a JZZ30 engine here and it looks like the High pressure line is a part of the idle up valve, different to the jza70 which it's 2 separate parts. the factory jzz30 high pressure line has been cut so I've got a JZA70 hose ready to go on.

The problem is I cannot leave the current idle up valve on since it has it's own outlet for the factory hose on it. Until I find a JZA70 idle up valve, can I run without one or would the engine totally stall on full lock turns or just the idle decrease a lot?

Is there any other 1jz, Chaser perhaps that has the same type of idle up valve that JZA70 has?

Thanks

**wilbo666** · 13-02-2011, 09:51 PM

My 1JZ used to stall on U turns without a PS idle up valve, wasn't totally un-drivable tho, not like you do a thousand u turns a day.

Cheers
Wilbo

**JZA70R_92** · 14-02-2011, 02:07 AM

ive got one from a 7M boris you think it will fit? I shall check in the morning for ya

**zombie** · 14-02-2011, 03:12 AM

picture of the setup so we can see what the difference is?

**JZA70R_92** · 14-02-2011, 03:32 AM

just had a look at mine my idle up valve is coming out on a angle facing to rear of fire wall very similar look to the MA70 one ive got at home someware. pics would be good boris

**Z2TT** · 14-02-2011, 04:06 AM

I'll get a picture of the one on my JZZ30 engine.

Carlo if you got a spare 7m one I guess I could try that one if it will work on a 1jz pump.

Thanks.

**JZA70R_92** · 14-02-2011, 05:11 AM

it looks similar to the on my JZ ill check when get home this morning

**George** · 14-02-2011, 08:22 AM

I run my 1jz-ge vvti with non-toyota p/s pump (my steering system needs more pressure). So there's no idle up switch to the ECU and no extra air into header when p/s pressure is high. The only thing happening when I steer hard is idle dropping down to some 550 rpm. It stalled just once over period of half a year. So I assume there's no reason to try hard and install some p/s switch.