Asterothe

Hello everybody,

I have a fuel pump problem and after
searching the forum I think I have to
check the fuel pump relay. How can I reach
to that guy? I have '84 GSL 12A .

Thanks in advance.

Korhan

Asterothe

Let me give some backgrounf of my fuel pump story.
One morning the car didint run. The fuel
wasn't coming to the carburator. I put some gas
by hand to the carburator then the engine started.
So I thought that fuel pump was dead. I bought
a new one from and auto part store. It has box shape
instead of the original cylindrical one. I changed it and
the fuel filter. But it didint run. I had hard time to fit
in the new pump to its place. In another auto parts
store I found a cylindircal one which looks like the orginal.
Should I switch to it? I am not sure if the one that I
installed is always in touch with the body of the car.
It has to be , am I correct?
Anyways I figured out that there's no juice coming
to the fuel pump connector. And surpisingly the day
that I thought fuel pump died, the cigarette lighter was
working but now it's not. I changed one of the
ignition coils since one was in very bad condition.
And also I connected the ends of the old fuel pump
to the battery and it ran!. It hurted too much. So
my main problem is electrical and I am not even
sure if the new fuel pump is a good replacement.
Why did cigarette lighter's juice go off? Then in
the forums I learned about the relay . This is the
origin of my first post.
You can see guys I am so inexperienced, a rookie.
Any help would be greatly appreciated. I missed my
car a lot. Thanks in advance.


Korhan

bouis

I can't help you with the relay, but you should know that the fuel pump on the 84-85 12a models only runs when the car is running, not when the key is turned to the "on" position like previous models.

Asterothe

Thanks bouis. I know and I think that's
the purpose of relay. i have to find it to check
it. In some post that i found in the site it days it's
under the dash. But I was unable to find it.

budrud

It's under the dash just to the right of the steering column. If you get your head under there and turn the key to start you can hear it click. I you need check it unplug it and run a jumper wire from the top left hole to the bottom middle. thats with the catch up on the plug.

Asterothe

Thank you bud. I found and
short circuited it. And guess what
the pump started to click. I was happy !!
Now I need a new relay and in the car
part stores they dont have it. They recommend
to go to the dealer. I searched the forum and
in one post they say that the relay is a simple
bosch fog light relay. Can anybody confirm this?
And where can i find it? Can I drive without relay?

Asterothe

And is there a way to be sure that
the old relay is defective ?
I'm sorry for so many stupid questions.

MIKE-P-28

iTrader: (1)

see that little button in the window of your reply taht says 'edit' ? might be a good idea to use it...

relay ought to be easily obtainable just about anywhere, thats one of the last parts people at the junkyard will take.. and to answer your question about is it safe to drive it like that, well look at it this way the designers of the electrical system in the car put it there for a purpose... id probally say it needs to be there...

Asterothe

Sorry most of the times I use that little button .
So where do you suggest that I go for that part?

MIKE-P-28

iTrader: (1)

im sur someone on here could send you one froma parts car they have.. if it were me, id just wire in a bosch 5 point relay myself. but thats me and about 12 years of professional car stereo installation experience

Asterothe

Today I looked around and most places
recoomend to go to dealer. They are selling for
$ 49. I tried to change spark plugs today while
waiting, and there's oil leak in the right ones.
and theres a very unconnected thin wire . I wonder
if this may be the cause of the problems. Still the
car doesnt start. With out the relay , ( but short
ciruited) can I start the car? (not dirve just to see
if it runs). I am worried about the wire i found.
Maybe I should give up and go to a mechanic
but I feel so close to the answer..

Mike-p-28 , today i found a place that sell bosh
5 point rrelay and the guy told me that that
relay would open and close the ciruit in short
intervals. Which one do I need ?

budrud

I wouldn't hesitate to start the car with the relay jumped. driving for any length of time I don't know. just remember the pump is running the whole time the key is on. I would head for one of those get your own parts junkyards for the relay if there is one around you might find some other goodies you need as well.

Asterothe

I will try to check a local junkyard.
I still wonder how can I test the old
relay.

Asterothe

Today I get to run the car but the front ignition coil
is not sparking. Is it the trailing one? There's no voltage across it. How should I start to deal with the problem? How can I learn about the order of the spark plug cables? i changed all the spark plugs. And the fuel pump I installed has shape of box . The orginal was cylindrical. It doesn't have any controls on it. Do you think I should keep it?

budrud

You test the coils by using a ohm meter across the 2 wire terminals- not the spark plug looking wire -ohms should read around 1.35. The wires go as follows standing looking at spark plugs -
top right on cap = top left plug
top left on cap = top right plug
bottom right on cap = bottom left plug
bottom left on cap = bottom right plug
I would make sure the wires are all on right first and the plugs are good. I haven't seen many coils go bad. As far as checking the fuel relay you could start the car with the relay jumped then shut it off and restart with the relay hooked up If it doesn't run out of gas within 10 minutes or so it works. I would keep the square fuel pump as long as it doesn't flood the carb over. You are facing alot of the same issues I faced on a 81 I bought that had been sitting a long time.

budrud

I forgot to mention there should be a single wire to each side post on the 2 coils make sure the single thin wire you mentioned isn't one of them.

Asterothe

Thank you very much budrud. I will
check tomorrow.

MIKE-P-28

iTrader: (1)

I could figure it out if I had it right there next to me, but you being there and me being here. I doubt I could explain to you how to do it, much less give you 12 years of car electrical wiring knowledge. sorry I cant be more help. Id say ask in here in a new post with a picture to what you need. I know someone will have one in a parts car laying about in their possesion.

Asterothe

Thank you Mike. Now I am not even sure
if my problem is the relay. When I short circiut it
it runs for a shile then stops. But It restarts and continue to run and stops again. The odd thing is
rpm odometer shows nothing! It's always 0! Before
all those problems started, the needle was doing crazy
movements go up and down again in short intervals.
The engine's rpm is not cahnging really. I wonder
if this had something with all the problems.

And I checked the order of Spal plugs and they are
fine , thanks again bud.

Asterothe

Since 30 mins has passed I am making a new post.
Is there a way to test that one of the ignition coils
is actually working fine? The ohm test looks ok.
But 2 of spark plus are not firing. I dread that
the coil is not getting juice. There's no continuity
around teh cables coming to it but also for the
working one so I can't tell if this is really my problem.
I am sorry to asking so many questions. If I knew
what is my real problem....

budrud

You might try switching the coil wires to the dist. cap and see if the non-working plugs switch. The car should run if the primary plugs have spark the other 2 are for pollution. I would check my ground wire, sometimes if they don't get good connection all kinds of weirdness happens. I'm assuming you have a good fuel filter and the tank isn't full of rust. Why don't you pull the fuel pump and jump it to a battery- just be carefull not to blow yerself up and run a fuel line from a gas can into a measuring jar so you can see if the darn thing works. you should get around 2.25 quarts per minute- then do the same test with it in the car and measure the flow from the fuel line off the carb. I had one that seemed to be working good but wouldn't push the gas up to the carb. at least if you jump it direct from a power source you will know it's a wiring issue. It kind of sounds like your fuel system is full of junk possibly. The gas tanks on these thing don't take sitting well at all