bajanrich

Here is my issue. I rebuilt my 3.5 motor for my 99 max and since that time I have been having starting issues. It takes a very long time to start after several cranks.. I took the car to dyno ship as I thought it could be a fuel/air issue it was tuned and the dude thinks my timing maybe a bit off? Is there any way to check your timing without taking off the timing cover. Any thoughts would be great.

JvG

Your symtoms are very similar to fuel pressure issues. Such as leaking injectors or the fuel pressure regulator.

I'd advise looking in to this possibility before tearing your engine apart again.

bajanrich

I changed the fuel pressure regulator about a week ago and I can see it is holding the pressure on the gauge

bajanrich

I will get some injectors and replace them

JvG

As long as the fuel rail is holding pressure, we should be able to assume that the injectors are not leaking.

So your problem is probably something else.

DennisMik

iTrader: (2)

What was the timing advance running at? If the belt was off a notch, I would think the timing would be wrong.

The engine needs to crank at 350 rpm in order for the crankshaft sensor to develop a .5 volt signal needed by the ECU. Check the starter that the planetary gear set has not run dry as this will slow down the starter. Also check that the gear on the starter has 11 teeth.

Turbobink

iTrader: (2)

If you haven't done so already, I'd also consider looking into replacing the camshaft and crankshaft position sensors.

M in KC

^Or at a minimum taking the sensors out and cleaning the magnetic contact surfaces. You might be shocked at how much debris has collect on them.

CallMeThatOneGuy

iTrader: (2)

When my timing was off by 1 tooth (on the crank) I was misfiring on 2 cylinders, but not hard starting.

DBear

There are a lot of threads on here about hard starting caused by bad contact between the transmission and engine mating surfaces, usually after replacing the transmission. The solution is often to drop the tranny and clean off the surface, but a lot of people have solved it with additional ground wires. Not sure if that would apply in your case, but it certainly suggests making sure your existing grounds are clean and tight, especially the one under the battery tray.

bajanrich

I changed the crank, cam sensors and even the starter and the same issue. Still have to crank min 5 to 6 times before it starts up.