Hard to Start

[cudabob496]

Dang, car is very hard to start since I changed the primary accelerator pump cam
in my 850 DP.  Doesn't seem to want to fire up. Accelerator pedal is also harder a little harder to push down. Didn't think
a more aggressive pump cam would do this, or give these symptoms.  Guess I just have to keep experimenting
with different throttle positions on the carb(gas pedal) while trying to start it?

Or maybe something else has gone wrong about the same time I changed the cam?

I usually pump it 5 times before closing hood, just to get some gas fumes circulating. I may
be emptying the primary bowl of fuel before I start cranking it.

[cudabob496]

ok, figured it out.
may have been pumping the primary bowl dry.
so this time, pumped twice, waited about 20 seconds, then
started it with the gas pedal 1/4 down, and it started right up.
I don't have a choke tower, so that adds a little challenge to it.

[Chryco Psycho]

pumping 5 times with a Holley would seem to be excessive

[cudabob496]

pumping 5 times with a Holley would seem to be excessive

ya, thats what I had to do with my old wimpy accel cam, but I agree, maybe
all I had to do was pump it 2 or 3 times and fire it with the gas pedal 1/4 down.

[Super Blue 72]

Glad you got it figured out, but like Chryco referred to, that's a lot of gas!

[HP_Cuda]

Wow image 5 squirts emptying the bowls.... no wonder you had the problem.

[jimynick]

The worst part is the cylinder washing those several ounces of gas were doing. Every Mopar I've ever had wanted something different in it's start routine. I'd try just cranking it and 1/4 throttle or at most give it one shot and then try it and see what the minimum is that it'll take to start. Good luck

[Chryco Psycho]

 
give it 1/2 to 3/4 pump leave the throttle close & jump on the throttle when it starts , 5 squirts you are washing all the oil off the cylinders on a cold start , not good for engine life !!

[cudabob496]

give it 1/2 to 3/4 pump leave the throttle close & jump on the throttle when it starts , 5 squirts you are washing all the oil off the cylinders on a cold start , not good for engine life !!

OK, thanks, is this advice good whether you have a choke or not?

[Chryco Psycho]

most of my cars have never had chokes so yes , put in the minimum amount of fuel to get it running & feather the throttle from there ,

[cudabob496]

give it 1/2 to 3/4 pump leave the throttle close & jump on the throttle when it starts , 5 squirts you are washing all the oil off the cylinders on a cold start , not good for engine life !!

Could be another situation where running 0wt-30 synthetic may be saving my bacon (a little), in that
it flows quickly to coat engine parts at startup.

[72cudamaan]

Could be another situation where running 0wt-30 synthetic may be saving my bacon (a little), in that
it flows quickly to coat engine parts at startup.

Except any oil will get saturated with fuel if the cylinders are getting washed down. That's still not good.

[HP_Cuda]

Imagine a cylinder coated with oil but you dump a boatload of fuel down there. Once this happens you have effectively made a metal on metal condition and the life of your motor just got shortened.

[cudabob496]

Except any oil will get saturated with fuel if the cylinders are getting washed down. That's still not good.

Totally agree, not good. Just saying a light weight synthetic oil will re-coat the cylinder walls
quicker.

Not sure I can see how pumping a Holley 5 times is gonna wash all the oil off
all the cylinder walls on startup, but not an expert in this area.

Nother good reason to use Engine Restore. Fills in scratches on cylinder walls in older engines,
restores cylinder pressure, and reduces oil consumption.  I use it on all my oil changes, as engine is 12 years old now. Its
also beneficial as I used the thinner piston rings, which are prone to more oil consumption (but allow you to make more power,
due to less friction between rings and cylinder walls).