[69galaxie500]

I have tried multiple times and still not correct. Please I need instuctions for dummies ( me). I changed intake and carb and now have a huge stumble, or trying to die, when I punch it or anything harder than a feather touch. I checked and set accelerator pump, it's only a 600 vac. secondary holley on a stock 390. Thanks in advance.

 

[ckelly]

You need a bigger shooter for the carb. It's probably got a 28, try a 32. You may also have a vacuum leak.

 

[69galaxie500]

Vacuum is steady at 20, I still checked with carb cleaner every where and no changes.

 

[mustangboy]

Did you try playing with the timing to see if it would help?

 

[FEandGoingBroke]

To Answer your question

69 Galaxie, follow these instructions....

A: Rotate crank until #1 Piston is TDC in the cylinder (use a dowell or screwdriver carefully and rotate crank by hand- ensure it is on the compression stroke and the balancer timing indicator lines up tiwh the pointer)

B: Look at the #1 plug wire on the Dizzy Cap, then remove cap and look at the position of the rotor's tip-It should be within a 1/4" of either side or dead on the plug wires lead as indicated by the cap.

C: If it is not pointed there, you may be on the exhaust stroke and not the compression stroke... (Easy to see if you have the valve cover off then you can make sure the piston is coming "up" and the valves are both closed and not moving)

D: Once positive that #1 is op to TDC on the compression stroke, remove the distributor (if necessary) and ensure that the rotor points at the #1 plug wire pickup when re-installing. You should be within 12* of perfect timing for the motor and it should be safe to start up and adjust timing with a light.

E: If all of the above is done and the car still pops and sputters and run's like crap, clean and adjust you points if applicable, then take to the posts above...

That should have answered your "How do I Install My Distributor" question.

FE

_________________
I may be schizophrenic, but at least I have ourselves!

<font size=-1>[ This Message was edited by: FEandGoingBroke on 3/6/06 8:10am ]</font>

 

[lilrobo]

hey we had the same thing ,, we change the intake added a 4 barrel carb and everytine he pumched it it had a mis or stumble and we found a loose wire on the coil it was ok ideling i just happen to see it spark once i tighten iit no more runs fine we have a steedy 18 psi close enough

 

[69galaxie500]

Thanks FE, she is on dead center now, but still runs crappy. Idles fine, can wing it up and perfect in park, but under a load shill just sucks air and tries to die. I wonder if it is not enough total timing?

 

[pedal2themetal45]

Hay ya 69
Are you using a timming light?? The Timming can not be set close enough without one to run right.. HMM Isn't a 390 an FE motor if it is maybe you got the valves to tight or do you not have to remove the push rods to remove the intake on the 390?? Just guessing
But your prob sounds like eather timming, valves or vacuum leak.
Tim

 

[MNSJR]

I chased a simular sounding problem - turned out tobe vaccum leak. Check for vac. modulator on your tranny if it is an automatic. Mine was intake gasket on a 302 Ford Crate Engine.

 

[mustangboy]

On 2006-03-06 06:20, pedal2themetal45 wrote:
Hay ya 69
Are you using a timming light?? The Timming can not be set close enough without one to run right.. HMM Isn't a 390 an FE motor if it is maybe you got the valves to tight or do you not have to remove the push rods to remove the intake on the 390?? Just guessing
But your prob sounds like eather timming, valves or vacuum leak.
Tim

Many people don't even use a timing light and I never owned one till recently.You just advance it until it pings under load and then come back until it stops.The FE motors use a bolt down rocker shaft so valve adjustment is pre- set and can't be made too tight(unless you have adjustable rockers)..

_________________
1968 mustang 306,stock ported heads,650 Holley DP,weiand xcellerator intake, Comp cams Magnum 292,[email protected] and 518L,heddman headers,4speed with a 4.11 detroit locker.13.69 at 101 mph.

<font size=-1>[ This Message was edited by: frdnut on 3/7/06 12:06am ]</font>

 

[pedal2themetal45]

hay 69
Maybe its fule level in the carb.. have you checked that as well as fuel prusher.

Hay fdnut
If you never used one untill lately (timming light) why are you useing one now?? just courious..
Tim

 

[FEandGoingBroke]

Probably like I do Tim.... I just use it to tell me the timing #'s after I time it by ear. Which is harder for ma than many of you think... I've NEVER heard a motor Ping except for a '68 Mopar 440 under load with 3 deuces on it and 3" exhaust with a nice quies muffler on it... On any other motor I've never been able to detect the 'ping' factor by ear because my hearing sicks so bad...


FE




What was that you said Tim? I didn't catch it...

 

[mustangboy]

On 2006-03-06 09:26, pedal2themetal45 wrote:

Hay fdnut
If you never used one untill lately (timming light) why are you useing one now?? just courious..
Tim

I pull the distibutor every spring in my mustang and prime the oil pump after it sitting all winter.The light makes it easier to put the timing back to where it was before I pulled the distributor.I have set the timing through trial and error at the drag strip to give me the best power......Also its partly like Feandgoingbroke says I sometimes will check a car after I set it just to see where its at...I'm not saying I don't ever use it to set the timing but I still always tinker a little to make sure it seems to run the best at that setting...I also use it to check to see how much the mechanical and vacuum advance are adding to the total timing..