No Current To Fuel Pump Due To Alarm/immobiliser?

[feb 47]

Hi,

 

I am driving back to greece tomorrow and the car has decided to play up tonight!

Thankfully I was in my local garage to drop a friend off and it happened there.

Basically there is no current going to the fuel pump. We hardwired the pump to the fusebox as a temporary fix and i am going back tomorrow to try to fix it properly.

Has this happened to anyone before?

Any suggestions are greatly appreciated as I have a 8h journey to Ancona tomorrow and don't want to break down in italy!

The alarm is a clifford 300

 

Thanks a lot

[ORB 227 1 Cars]

This happened to me with the Toad in my car.

 

I tore the whole thing out and as I was doing it, I took out the alarm too.

 

Seemed the easiest fix

[steve@cornwall 100]

Possibly tachymetric relay problem- un-related to alarm? (I think "tachymetric" is a Greek-based word?)

[mi16nut 0]

The good old Tachymetric relay perhaps?

 

The ECU relay on my mi16 gave similar results when it failed.

 

Mark.

 

Beaten to it!

[feb 47]

Possibly tachymetric relay problem- un-related to alarm? (I think "tachymetric" is a Greek-based word?)

it is indeed tachy means fast.

does that mean replacing the whole ecu or can the relay be replaced by itself?

i wonder what the tachymetric relay is called in french to explain to the garage

starting to worry whether i make it to the ferry or not now..

[Simes 248 2 Cars]

You can buy that relay separately. it maybe that GSF sell them.

 

Are you driving all the way to Greece? Fantastic!

I thought my regular trips all over France and Italy were decent missions!

[richard 0]

Tachy is by the ECU under the dash (assuming rhd, it's the right hand side underneath looks like a normal relay and should be screwed in.)

 

I had a similar problem on the 1.6, first signs were the alarm was constantly going off..then one day it wouldnt fire. When it was out of the car, it was a burnt out mess!

 

A replacement fixed...and a damn sight easier than ripping out the alarm/immob.

 

Loads of topics by the way about the tachy relay,

[feb 47]

Thanks guys. The garage has ordered a new relay, i hope the part arrives by this evening otherwise i will have to drive with the boggo fix -a bit worrying!-

I am driving to Ancona then onto ferry to Patra, can't wait!

[jackherer 543]

i wonder what the tachymetric relay is called in french to explain to the garage

 

I'm pretty sure its relais tachymétrique

[Ghostcav 0]

Was actually gonna start a post similar to this but here's one already,hope you dont mind a slight thread hijak

 

Mate phoned me last night having probs rebuilding his 89 1.9 205 GTI.Engines in now & wired up but when he trys to start it the engine turns over but nothing.He's checked & there's no voltage going to the fuel pump or to the injectors.He tried wiring another battery to the fuel pump before he realised there was no signal to the injectors either. Would this be the tachymetric relay? He's changed the ECU already with no effect.

[steve@cornwall 100]

Was actually gonna start a post similar to this but here's one already,hope you dont mind a slight thread hijak

 

Mate phoned me last night having probs rebuilding his 89 1.9 205 GTI.Engines in now & wired up but when he trys to start it the engine turns over but nothing.He's checked & there's no voltage going to the fuel pump or to the injectors.He tried wiring another battery to the fuel pump before he realised there was no signal to the injectors either. Would this be the tachymetric relay? He's changed the ECU already with no effect.

 

My fist check would be the condition of the wiring from dizzy to amp- sonds like the dizzy's not telling the ecu that the engine's turning, so it's not switching on spark or fuel

[Ghostcav 0]

My fist check would be the condition of the wiring from dizzy to amp- sonds like the dizzy's not telling the ecu that the engine's turning, so it's not switching on spark or fuel

He's got a spark at the plugs,it's the injectors that have no live feed and doesnt the fuel pump start before the dizzy even starts turning?

[steve@cornwall 100]

He's got a spark at the plugs,it's the injectors that have no live feed and doesnt the fuel pump start before the dizzy even starts turning?

 

I think it's the job of the tachy. relay to sense engine movement-via dizzy, and switch fuelling on (I thought pump included)

Also, aren't the injectors constant live, with switched (pulsed) negative?

Live supply (I think) comes from the ecu

Obviously if there's spark, the dizzy wiring's o.k

[TEKNOPUG 3]

£20 says that it's the immobiliser at fault

[feb 47]

Update: changed the tachymetric relay and car is working fine. Old relay was burnt...

[feb 47]

Problem has come back again (new relay sticky? -see below)

This morning I couldn't hear the fuel pump clicking. I left the car a few hours and then started up fine. Ever since, on startup the fuel pump wouldn't click but the car was working fine (relay stuck open i guess). On the next startup I heard the relay clicking, car ok.

Tonight the pump wouldn't click again-car doesn't start

Off to an auto-electrician on tuesday, keep the suggestions coming as I have a 900km drive on wednesday!

Thanks

Edited December 29, 2006 by feb

[feb 47]

Bad connector to the tachy relay and dodgy soldering of a cable(!) was the culprit. Sorted now (touches wood).