Rotofire

Okay, I've got an 85 GSL. I was cruising home last night at about 30mph and the car just dies. It didn't shutter or anything, just died and rolled to a stop. I let it stand for a minute and it dosen't have any more problems. Today it did it twice. It's getting spark and plenty if gas. Oh and I've got a weber 45dcoe on it. Any help would be greatly appreciated. Thanks in advance.

-mike

79+80+84_rx-7

right as it dies, will it start right back up?


Could your needle and seats be starting to wear because of too much pressure, or what?


How were you driving the car when it dies?

jetted wrong for crusing?

Elysian

wish my issue was like urs... my REPU coughed up some apex seals today... the rear rotor gets no compression... just bought the thing thursday, and now this... the motor was runnin strong as hell, then it coughs one or 2 up while trying to pass a slow *** car in the fast lane..

KehoeAutomotive

How did you check for fire? Did you pull the plugs out and check at the plug itself?

Engines needs three things to run Fuel, Fire, And Compression.

Rotofire

Thanks kehoe but i know what it takes for an engine to run, I pulled the plug and cranked the enigine when holding the pulg to the block (housings) this way you can see a spark, which was a pretty blue by the way. Didn't check compression, but i don't think it's the culprit, it seems to be getting fuel, it's got a holley red fuel pump with regulator (regulated to about 3psi) which all leads into the weber 45dcoe. So it should be getting enough fuel pressure. Yes there is gas in the car. I haven't had the problem yet today, it seems to be only at cruising speed. I think my jetting is wrong, but why would it wait a few weeks after install until it started acting up? any other thoughts?

Tom

No stutter or sputter, just dies out? Sounds like an intermittent short somewhere that could be killing juice for spark. When it starts up again do you have to pump the pedal to get gas or is the bowl 'full'?

mazdaverx713b

iTrader: (91)

have you inspected fuel pump wiring???

Tom

yeah- that's kinda what I was thinking too..fuel pump. But the car should sputter when fuel starts to run dry.. Next time it happens, check the fuel level in the bowls..See if it's dry. If it is- fuel delivery is the culprit. If full- maybe the needle and seat is bad.
Have you played around with the jets? maybe the emulsion tubes are clogged up?

If it's a clean engine cut-off though- I would not rule out loss of spark somehow...

Rotofire

hmmm, for the fuel pump wiring I conected the holey fuel pump wires with the conector from the original fuel pump, but i soldered them and heat shrinked them pretty good so chances are the conection isn't loose. What would cause shorted spark at higher rpm? it isn't alternator because my lights work fine and they didn't dim or anything when it died, could it be coil shorts?

slashdawg00110

Do you have the stock ignition? If so, try swapping the ignitors around. Replace the heat sink paste behind the ignitors while you're at it. Really, though, my first looks would be with the fuel delivery system.

Rotofire

yea, I'm going to do a cavity search on that car tonight, the culprit must be apprehended! (I can't spell worth a **** so i don't know if i spelled that wrong sorry) I'll give the ignitor swap a shot and see if it helps anything, I'll also do a run down the fuel delivery system.

slashdawg00110

just so you know, your spell-checker is working. I didn't see any misspelled words.

Good luck.

What I'm going after with the ignitors is that something may be getting too hot. Electrical components are particularly heat-sensitive.

cdrad51

My bet is on the fuel delivery system. My car exhibited the exact same symptoms when the fuel pump gave up the ghost... the car will not necccesarily sputter when fuel pump fails. It will die like if you turn the ignition key to the off position.

if fuel pump is new and within specs for your carb, check the wiring, including the fuel pump cut relay under the dash.

Tom

After thinking for a moment- I'm *** backwards on the coils. I think problems with coils are at idle/low speeds. They usually go away at higher RPMS's (during advance).

SA22C_NZ

Right, I'd say you could well have a blocked breather for the gas tank. Does it make a funny whooshing suck suck sucky noise when you refill gas and remove the cap?

cdrad51

Good luck and let us know what turns out to be the cause of the problem.

Rotofire

Sa22-can you go into more detail on that? (gas tank venting problem) Well it does do somthing else, i thought was Main Jeat related in the carb is that when going aobut 60mph in third (probably around 5K on the tach) the car shutters and wont go over until I switch gears. Thought that might be a gas tank venting problem as well.