Author Topic: IDI pump  (Read 384 times)

April 04, 2021, 02:34:12 am

Colony

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IDI pump
« on: April 04, 2021, 02:34:12 am »
Hello
Can some1 tell me what function have this electronic part on pump?
Where electric impulse go? I dont have ECU on car but have something called 357906121 Exhaust gas recirculation control unit for Volkswagen Passat B3.

Engine code: AAZ

I have some vibration on idle and it goes away if I get revs higher . Engine AAZ 1.9TD 1992 Passat B3

« Last Edit: April 05, 2021, 06:34:18 am by Colony »



Reply #1April 04, 2021, 02:21:21 pm

ORCoaster

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Re: IDI pump
« Reply #1 on: April 04, 2021, 02:21:21 pm »
Having never seen such a pump I have absolutely NO IDEA.  Sorry, I defer to others.

Reply #2April 04, 2021, 06:11:53 pm

sgnimj96

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Re: IDI pump
« Reply #2 on: April 04, 2021, 06:11:53 pm »
looks like it bumps up the idle,  I bet if you could see under that top cover the wire goes into you'd figure out what it does.
81 Scirocco 1.6D (conversion)    86 Gofl 1.6D      2003 Golf Tdi   1985 300TD

Reply #3April 05, 2021, 12:09:24 am

fatmobile

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Re: IDI pump
« Reply #3 on: April 05, 2021, 12:09:24 am »
 What you circled is probably just a plug holder.
 The wire probably goes up to a throttle position sensor.
 Complete guess, I have no experience with this pump.
 Might be handy for an electronic VNT-15 turbo controller.
Tornado red, '91 Golf 4 door,
with a re-ringed, '84 quantum, turbo diesel, MD block

Reply #4April 05, 2021, 12:19:40 am

Colony

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Re: IDI pump
« Reply #4 on: April 05, 2021, 12:19:40 am »
UPDATE
I found out more. When you disconnect this plug on pump egr solenoid stops working and egr shut closed on idle. So this is some part of egr sistem.

Reply #5April 05, 2021, 11:30:01 pm

rabbid79

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Re: IDI pump
« Reply #5 on: April 05, 2021, 11:30:01 pm »
My vote is throttle position sensor too. My guess is that the EGR behavior you noticed was in response to the system losing contact with the TPS when you unplugged it.
'15 WRX
Parts for 2.0 TD build - Now looking for suitable car to put it in.

Reply #6April 16, 2021, 10:25:25 pm

thomas m

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Re: IDI pump
« Reply #6 on: April 16, 2021, 10:25:25 pm »
I thought that my 1991 MK2 pump was unnecessarily complex.
That one makes mine look like a Tinker toy!!
Thomas, Original owner since new:
1991 MK2 Jetta Non-turbo 1.6 diesel, Engine Code ME, 5 speed 020 AWY 04120 transmission, Hydraulic Lifters,
320,000 miles
Location: Vancouver, WA
LOOKING FOR REBUILD OPTIONS IN PORTLAND, OR OR ON THE WEST COAST