HeLP 4.6 NO START

[89crownlx]

I got a 1994 mercury cougar 4.6, ran fine last night, this morning car cranks but won start, fuel pump primes ,fuel at schrader.
What can I look at for a spark issue? woul both coil packs fail at the same time? is their a crank trigger problem on these? need help this is my bros DD.

[SVT98t]

Check the fuses and relays. Make sure none of them pooped themselves.
You can put a test light in the out side wires in the connector going to the coil pack. there should be 3 wires. Two bigger wires on the outside with a smaller one between the two. They may even be red.
-Disconnect that connector.
-Ground the test light and put the tip of the probe in one of the two bigger wires. You'll have to check both anyways.
-Try and start the car. If you get the light to go on and off quickly, then, EDIS is working. If not, try the other side. If the other coil pack is good, then that ones shit.
But the car should still start if one coil pack is shot. It'll sound like hell, but atleast it will start.
EDIS may be shot. I doubt it.
If not, go up the engine schematic tree. I hope this isn't the problem I had.
-Try checking the CPS (Crank position sensor)
-MAF
A Haynes Manual may explain this easier. If you need a better explanation, I can scan my coil pack troubleshooting pages from my Haynes manual.
Here is the engine schematics:

http://www.grandmarq.net/texasvic/Te...eschematic.gif

I had a similar issue last year. No fuel pump or spark, but would crank. Fuses were good. Changed the fuel pump. Problem still existed. Checked for spark. No spark. Checked EDIS. EDIS was good. Jumped the fuel pump relay. Relay was good. The relay for the PCM was bad. The PCM relay controlled the fuel pump relay. Replaced the PCM relay. Problem still existed. But when i jumped the PCM relay, the car worked. I re-wired the terminal block and put in a new relay, and the same issue returned.

Conclusion:
I have a switch in my dash that jumps the PCM relay. Every time i want to start my car, i have to hit the switch or the car doesn't run.

It doesn't sound like this is your problem. But keep us up to date on whats going on and if this helped or not.


-ryan s.

[gadget73]

Check the connections on the crank sensor. They are known for getting crapped up and causing a no spark condition.

[89crownlx]

OK so I went back and sprayed a little ether in ti to see if I had spark car fired up and has ran since?? now I am confused because it wouldnt start at all after several tries.

[DriverSideImpact98]

Was it turning over slow before? Did you change anything before you tried the ether?

[FordMan77]

I'd still take a look at the wiring to the Crank Position Sensor. Give it a wiggle and see if it affects it or not.

If you're not familiar with that vintage of Cougar, stroll over to www.tccoa.com and take a look there. Plenty of info on the MN-12 there.

Jay

[89crownlx]

thanks for the tips, I look at it next time my bros in town, it's running so far the ground on the batt was loose we tightened it up, it cranks hard like its got no spark to fire it did this twice now that I know of, a little ether and it starts and runs now??

[79lincolnlover]

having similar issues with my aero CV...

My '92 CV has been acting up this week. One day after work, it took six tries before the car fired up...Tonight after work, I tried to start it. No luck until I put the shifter in Neutral. Lights and everything else worked fine when the key was put into acc position. Time for a new starter or what?

[FordMan77]

So let me get this straight, it would not start until you put it in Neutral?

Jay

[sly]

neutral safety switch may be suspect in park.

[SVT98t]

MLPS may becoming poopy.
Manual Lever Position Sensor.

It's on the side of the transmission,and that's what lets you start in either park or neutral.
You can pick one up at the junkyard and they are very easy to install.
Unhook the shift linkage and 2 10mm bolts.
Remove replace.

That is, if this is the problem.

-ryan s.

[gadget73]

might also check the mounting screws on the MLPS. I think there is some room for wiggle, and if its rotated it may not be going fully into park to allow it to start.

[86VickyLX]

My Mom's '94 had a problem with the actual shift lever being sloppy. It was hard to tell what gear it was in. Tightened some bolts in the back and presto, no more slack, and no more having to start it in neutral. This may or may not be your problem. Is the gear selector floppy?

[sly]

where are these bolts. I have the same problem with my 93.

[79lincolnlover]

So let me get this straight, it would not start until you put it in Neutral?

Jay

As I mentioned in my RR thread, the shift lever has been adjusted, so it's not loose anymore. The current starting problem pops up occasionally...The car started up fine in Park today. Perhaps hot weather is a factor? When it gave me trouble the other day, it was sunny with a temp of about 25C.