dean23

the fuel punps hot line isnt getting power. its the blue\yellow striped wire. anyone know where it goes???

Rx7TyreBurna

iTrader: (1)

Fuel pump relay?!

NZConvertible

The fuel pump only has power when the engine is cranking or running. When and how are you testing it? What is the actual problem?

BTW, the pump wiring is shown in the FSM wiring diagrams. If you don't have the FSM, click here and download it in PDF format for free.

zbrown

yikes.... the days of stock harnesses and ecu's... those are the days

Napsterfreak15

Im in the same boat. My rear harness is s4, my dash is s5. I'm thinking about hooking it up to a toggle switch

lupin

iTrader: (3)

in my 87 na the wire that is power is the black with white stripe I believe. The blue and red I think are sending wires. Do as NZ convertible says and do not hook up a toggle switch!

NZConvertible

And I'll bet neither are the problem...

zbrown

ha no i wasnt insinuating that.... i just remember how fun working with the stock harness and ecu was, wondering what was going on

86gxl_fc

does the fuel relay under the dash go out often? i've changed mine out about 3 times
just cuz it was the only other thing i could swap out that could be causing a problem.
i never actually noticed if it was the problem tho.. cant remember heh...

NZConvertible

No.

Did you think to test the relay before replacing it? Seriously, why would you replace something three times if you didn't know whether it was the problem in the first place?

86gxl_fc

dont know how to test it. i just pick one up from the junkyard when i'm buying other stuff.
its only 3 dollars

NZConvertible

It's in the FSM, like most things.

What exactly is the problem?

86gxl_fc

well, last night i plugged an LED to the power wire in the hatch near the fuel pump so see if its getting any power.
seems like its only getting power when i CRANK the engine because it lights up.
my car tries to crank up but but just feels/smells like its not getting any fuel.
i've already replaced bad leading coil packs.
but it seems like its got something to do with electrical.

NZConvertible

Which is how it's supposed to be, like I said above.

Are the plugs wet with fuel after cranking? This would indicate fuel but no spark. Verify spark by removing a spark plug, connecting it's lead, holding the plug against a good ground (use pliers) and cranking the engine over.

Is the AFM plugged in? Is the connector secure?

86gxl_fc

yes the AFM is workin properly.



i put them back on with the filtered fuel line going to the furthes from the oil filter..
and yes i know fram is crap, i'm just using it to get past the breakin.. then i'm doing another full tune-up.
those two lines is what i'm referring too.
and the L1/L2 coils go exactly in the order when installing right?
like L1 goes on the front rotor and L2 goes on the rear rotor..
and same goes with the T1/T2 right?

86gxl_fc

anyone willin to post up a pic on there lines from the same angle i posted plz?
i'll let you have a set of 4 lug phone dials for anyone willin to help haha.

Netyello

Always glad to help



My car is an 87 GXL btw. Let me know if you need more.

NZConvertible

Correct, the rotors are numbered from front to rear just like on any engine.

86gxl_fc

well not like any engine, i have a mitsubishi where the first ti fire was the 2nd piston.. yeh its teh gay!.
thanks for the enlightment Netyello.

one other question since you have the same year.. do you happen to have your 02 sensor plugged up?

can you snap a pic of where the 02 plug wire spring out of the harness? everyone snaps pics of where its SUPPOSED to go IE-the 02 sensor. but i have my 02 sensor in..
i just cant fine the plug from the harness to plug it into.
THANKS again!

NZConvertible

I didn't say anything about firing order. In any engine the pistons or rotors are numbered from front to back (with the back on a transverse engine being the the flywheel end).

I do, but I also have a RHD Turbo, so my Emissions harness is completely different to yours. Logically it'll come out of the harness where the harness passes close to the O2 sensor. That's all I can tell you sorry, you need an LHD NA owner to help you out.

86gxl_fc

while my engine was out i felt around the harness for loose plug sor nubs taht could HAVE been wires and one point and i didnt feel anything anywhere.
thats craps.. i've gone to the wrecking yard and i've spotted NOT ONE 7 with the 02 plugged in.
i've seen quite a few that havent been touched mind you and none of those suckers have it !...

My5ABaby

iTrader: (7)

The O2 wire (IIRC) comes out of the harness right under the UIM, near the primary fuel injectors. I think it's a green wire, but the FSM can confirm an answer for you.

NZConvertible

It's not green, it's black. You're thinking of the temp switch wire.

86gxl_fc

okay, i just tried push starting it again, and it doesnt seem to do anything..
we went up to 6k this time in first gear and nothing.
it just backfires alot then the revs just die off.
another thing. the neck that connects from the manifold to the downpipe, that sandwich started glowing red, and quite a bit of smoke started billowing out. it didnt quite smell like fuel.
i was thinking that it could be the petroleum jelly, or the MMO i put inside mixing with the fuel..
but i still cant think of a reason why it wouldnt want to start.

Rx7TyreBurna

iTrader: (1)

Double, triple check your Air Flow Meter. Make sure the plug is in. Also, I would avoid constantly trying to push start it. If something isn't working push starting it isn't going to do anything. Get a battery charger.

Pull the plugs. Saturated in gas? Running rich for some reason.

Make sure L1 is attached to the bottom of rotor 1, and L2 is attached to the bottom of rotor 2 (the rear rotor). Then T1 to the top of rotor 1, and T2 to the top of rotor 2.

Statically make sure your timing is on. FSM.

Pick up a cheap fuel pressure tester. Mine cost $15 and works great!

Jump the fuel pump prime thingy, yellow plug near the AFM. And put the car in ON position, but don't start it. And the pump will run during this time. I don't know about stock pumps, but I can hear my Walbro pumping. And then check around for leaks. Watch under the car. If there is a leak, you will see fuel dripping.

If fuel is fine, and spark is fine. Do a compression test. You might even want to start there.

Pull your cat and make sure it isn't insanely clogged. Or some other part of your exhaust.

Just be sure to check everything.

Not going to be easy, but it can be done.