Fuse Relays. How to remove and where to find them?

[x98boardwell]

Hello,

I am looking to pull my fuse relays which will allow me to turn over the motor and not start.

Can anyone tell me (photo's would be nice) where they are located and which ones need to be pulled... I think it is 2 of them.

Thanks in advance,

Bryan

[NathanUK]

You could just disconnect the overboost switch. Not the answer to your question but...

[Cowtown10]

Inside front drivers side fender. There should be a diagram on the inside cover with whats what
http://www.pelicanparts.com/PartsLookup/HTML/911_USA_84_86_KATALOG/902-00-Frame3.htm

[x98boardwell]

Is there one in the engine compartment as well.

Since there is two fuel pumps, I would think there would be two relays?

Thank you for the help so far.

Bryan

[Cowtown10]

Hey Bryan,
I just replaced both my fuel relays...they are side by side and both should be red...the other fuse relays are black.
I am just figuring things out as I go so hope that helps

[sand_man]

Agreed with what Nathan said...disconecting the over boost sensor should keep things from starting, provided the wiring hasn't been "jimmy'd" with by a previous owner.

In my car, the two relays closest to the windshield are the fuel pump relays.

[x98boardwell]

Everybody, thank you so much for the help. I removed the Red Relays closest to the windshield and it stopped the fuel pumps from coming on. Great.

I did not want to just remove the overboost switch as I would have been dumping fuel in the motor while I was trying to prime the new turbo.

It took almost 30 seconds for oil to come out of the bottom of the turbo as I had replaced 3 oil lines, drained the motor twice in 30 days and it ended up taking 12 quarts to fill.

Once again, I appreciate all of your help. This forum has been a great resource for me.

Bryan

[Cowtown10]

Quick question
I am having fueling troubles...after checking the relays, and fuel pumps is the mass air sensor something to check or the overboost sensor...I am not sure what the overboost is? or does?

[x98boardwell]

Cannot answer that question due to lack of knowledge. Hopefully, someone else can chime in here.

Otherwise, search the forum for your answer and there most likely have been threads on this subject already. Good luck.

Bryan

[carmad]

Cowtown,
The overboost sensor does exactly what it says, if boost from the turbo gets to high it will cut power to the fuel pumps. helps to stop the engine from getting damaged from high boost levels.
If you have ever had it cut in, you will almost shoot through the windshield if you dont have your seatbelt on.
It is a small sensor located under the intercooler, with a couple of wires coming from it. Some people short it out to stop the sensor working, not a good thing to do, you would risk damaging your engine.

[Cowtown10]

Ha too simple...but unfortunately not my issue then. My car dies either from a minute or two on idle or wont get fuel to fire up....hmmmm, could it be mass air sensor?

[infraredcalvin]

This seems to be the right place to post since we're on the subject I have a 76 turbo, pretty much stock, but does anyone know the difference between the black relays and the red fuel relays? The PO (and I still haven't changed it) had the black relays installed for the fuel pumps. I know the part numbers are different, but are they similar enough that they wouldn't cause any issues?

I'm trying to dial in my car, every once in a while (only in low rpms) it feels like I get an air bubble in the fuel delivery and my car will stumble for a split second, the fuel pumps have been rebuilt, I'm wondering if it might have something to do with the relays...

Any comments?

[NathanUK]

Could be. The red relays stay closed slightly longer than the black ones when power gets cut to the coils inside IIRC.