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80 series 1HDT rough idle only when cold

Tech Talk for Cruiser owners.

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80 series 1HDT rough idle only when cold

Post by vSAHARAx »

hey all
As above, the motor runs a bit rough at idle only when cold, give it a little bit of throttle and it evens out, once at running temp idles smooth as, what could this be any ideas????

Cheers Troy
GXL HDJ80 Cruiser - Lifted, Locked, 315's, 3" Zorst, Safari Intercooled, High Flowed Turbo, All the fruit. AMMS tuned coal shovel, Pushing 148rwhp... + heaps of the black sooty goodness...
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Post by lshobie »

What are the rpms at idle? Auto or manual?
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Post by vSAHARAx »

Manual and reving at around 750rpm
GXL HDJ80 Cruiser - Lifted, Locked, 315's, 3" Zorst, Safari Intercooled, High Flowed Turbo, All the fruit. AMMS tuned coal shovel, Pushing 148rwhp... + heaps of the black sooty goodness...
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Post by tuff 80 ute »

I have had the same problem with my 1HD-T.
I had the injector pump rebuilt which solved the issue but it has returned again. i beleve it's the cold start settings on the pump.
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Post by Dane »

Could be a glow plug.
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Post by joel HJ60 »

Dane wrote:Could be a glow plug.

Wouldn't be a glow plug once it's started, might be a lack of compression. Compression test it.
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Post by HIL01X »

1HDT doesn't have glowplugs so you can rule that out.
Allways been a TOYOTA man.
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Post by Z()LTAN »

its a vacuume line from the vacuume pump to the idle up solenoid

or some kind of idle up when cold...

have a look
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Post by mud4b »

its actually a crook injector, my last 80 done the same thing and my currant one is doing it now.

i got the injectors done on the last one and it fixed the problem, after a while the pump stuffed up so i got it fixed also (pump was done after the injectors so it eliminates the pump).

also on both my cold start part on the pump has been removed and blanked off so this eliminates the cold start also.

cheers mark
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Post by tuff 80 ute »

HIL01X wrote:1HDT doesn't have glowplugs so you can rule that out.
you must be miss informed as the 1hd-t does have glowplugs.
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Post by HIL01X »

tuff 80 ute wrote:
HIL01X wrote:1HDT doesn't have glowplugs so you can rule that out.
you must be miss informed as the 1hd-t does have glowplugs.

You could be right but I've never seen a diesel with direct injection with glowplugs. They usually have some sort of preheater.
I can't see either in the worksop manual on the 1HDT.
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Post by vSAHARAx »

one of the vac lines on the pump had popped off all sweet now :D cheers a heap fellas thank god its nothing major!!!!

Troy
GXL HDJ80 Cruiser - Lifted, Locked, 315's, 3" Zorst, Safari Intercooled, High Flowed Turbo, All the fruit. AMMS tuned coal shovel, Pushing 148rwhp... + heaps of the black sooty goodness...
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Post by Z()LTAN »

:D yeehee
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Post by Tapage »

Auto tranny and 1HD-T arounf 800 rpm .. ( netral and idle normal operative temp )

My 1HD-T have Glow Plugs .. here in Panama ( with low temps around 22C in a " cold " day ) we don't need it .. actually the temp sensor never activate it ..
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