Fuel Pump / Carb Manifold Heater Problem. Help!!!!

[JamesS]

Post-90 Fusebox Fuses & Relays:



Fuse No. Description Ampere Rating
1  Headlight, low beam, left 10
2  Headlight, low beam, right 10
3  Instrument panel lights, license plate lights 10
4  Glove compartment light 15
5  Wiper/washer 15
6  Fresh air blower 16-valve only: Air conditioning 20
7  Taillights, side marker light, right 10
8  Taillights, side marker light, left 0
9  Rear window defogger 20
10  2.0 16-valve only: Fog lights 15
11  Headlight, high beam, left,High beam indicator light 10
12  Headlight, high beam, right 10
13  Horn 16-valve only: Radiator cooling fan 10
14  Back-up lights, washer nozzle heaters 10
15  2.0 16-valve only: Engine electronics, stabilizer valve, cold start valve  10
16  Instrument panel warning lights, 16-valve only: Multi function indicator  15
17  Emergency flasher switch, turn signals  10
18  Fuel pump, oxygen sensor heater  20
19  Radiator cooling fan, air conditioning  30
20  Brake lights, cruise control  10
21  Interior lights, digital clock 16-valve only: Luggage compartment light,multi function indicator, central locking 15
22  Radio, cigarette lighter  10

Relays
Relay No. Description
1  Air conditioning
2  Rear Wiper
3  Digifant control unit (except 16-valve)
4  Load reduction relay
5  Low coolant level control unit or Open
6  Emergency flashers
7  Open
8  Intermittent wipers
9  Seat belt warning system control unit (possibly headlight warning too?)
10  Fog lights
11  Horn
12  Fuel pump (except diesel)Glow plugs (diesel)
13  Radiator cooling fan after run (except 16-valve)2.0 16-valve: Starter interlock relay
14  Automatic trans., coolant temperature indicator,starter interlock relay (except 2.0 16-valve)2.0 16-valve: Radiator cooling fan after run
15  ABS pump relay
16  ABS relay
17  Heated seat control unit, driver
18  Heated seat control unit, passenger, or power seat circuit breaker
19  Automatic transmission
20  Open
21  Power window relay, ABS hydraulic pump fuse
22  ABS valves fuse
23  Air conditioning, power seat fuse
24  Power window fuse

Hi all!

I posted a little while ago about a relay problem I have had on a 1.8 Driver(has a weber 32/34 on if that makes any difference). The 171 906 383 relay is buzzing when the car is warming up. I have replaced it and it still buzzes. The 171 906 383 relay is in no 12 on the fusebox board. According to the board above it's the fuel pump. But on another post 171 906 383 relay is for the carb manifold heater and i was advised to get Part No. 026 129 893 which I cannot find!

What does this relay control?? At the mo I have just taken the relay out because it's so anoying.

Any help would be appreciated.

JamesS

[mattkh]

Hi
Put up pictures of the under sides of the two relays and have a measuring tape in the photo.

[JamesS]

ok. I will put the pics up this evening. What is it you are looking for?

Thanks JamesS

[rubjonny]

yes on carb models that relay is for the carby bits, check in your engine bay round the carb for damaged wires, and do it fast since some of the wiring is not fused!

[wopdat]

I would love to help but i had the same problem with my driver back back back back back in the day!! There are so many factors that affect it so in the end i done what i should of done in the first place... SOLD IT!!!

Not that i'm saying you should sell it... check the wires around the carb, some of mine were heat damaged. Good luck.

[JamesS]

I will check around the carb for any worn wires. Thanks for the advice! James

[JamesS]

Hi all,

I have had a good look for worn wires but haven’t found any…….yet, im going to have another look. I could do with another pair of hands in the car saying when the relay buzzes whilst im moving wires about. It is completely intermittent, Sometimes when warming up from cold it constantly buzzes and other times, nothing! It makes sense that it is a wire rubbing somewhere as if you floor it, it buzzes and if you go over big bumps it buzzes. I will give it another look when it’s not pissing it down.

Have an idle problem also. When warm, goes from cutting out/250 rpm up to what ive set it at, 850. I have bought a service kit for the weber and I am hoping that will help cure the idle problem, along with good clean. I am also guessing that the idle problem is separate from the relay problem as webers are fully mechanical.

Having this caddy picked up tomorrow!

[rubjonny]

maybe its one of the temp sensors causing the problem, try disconnecting the red then the grey one.  if it stops then you found the sensor or circuit responsible

Also the autocoke heater earths thru the brown wire on the top o the carb to the rocker cover, worth checkin that out!

[JamesS]

Thanks for the advice rubjonny. Will check them tomorrow.