Help, Trying to get my engine to fire...

[Caleb]

Still where my money is. That backfire through the carb/tbi just screams it.

I'm going to give that a shot tomorrow...

 

[I Lean]

another thought I keep having (and JeeperG just brought it up again) is could it be getting too much fuel? I am using the normal E2000 fuel pump but it puts out max 95 PSI and TBIs only need like 15 PSI...could it be forcing too much out the injectors so its just auto flooding it? I know its supposed to return the unused fuel back through the return line, and being computer controlled could it still get too much?

I'm pretty sure the pressure regulator (in the throttle body, controls the return line) is just mechanical. However, it certainly could be doing that if it's malfunctioning, or if there's some restriction in your return line.

Maybe try unplugging your fuel pump while cranking? It gets a shot of fuel right at first, then stop the pump and keep it cranking....

 

[Hickey]

I think you should walk your little hiney the 6 blocks to Caleb's house and make it all better. I'm guessing it's an easy fix for someone who knows.....stuff. (which I sure don't)

Pfft. Whe it comes to engine stuff, I am a scared little bunny rabbit. Sure, I can rebuild one, but tuning and diagnosis? I am beyond retarded when it comes to that. That's what you get when you take choir instead of auto shop.

 

[Caleb]

I think you should walk your little hiney the 6 blocks to Caleb's house and make it all better. I'm guessing it's an easy fix for someone who knows.....stuff. (which I sure don't)

or he can drive


I agree, its prolly something really easy and someone that knows what they are doing is gonna look at it, say blah blah blah, and its gonna fire right up...

 

[Caleb]

I'm pretty sure the pressure regulator (in the throttle body, controls the return line) is just mechanical. However, it certainly could be doing that if it's malfunctioning, or if there's some restriction in your return line.

Maybe try unplugging your fuel pump while cranking? It gets a shot of fuel right at first, then stop the pump and keep it cranking....

thats a good idea, I'll try un-hooking my pump and see what happens...I have unhooked the injectors before trying to get it to fire on whats there and still does the same thing but the one last shot might be a good idea...

 

[Hickey]

I'm pretty sure the pressure regulator (in the throttle body, controls the return line) is just mechanical. However, it certainly could be doing that if it's malfunctioning, or if there's some restriction in your return line.

Maybe try unplugging your fuel pump while cranking? It gets a shot of fuel right at first, then stop the pump and keep it cranking....

Think about this. We have spark, we have fuel, and both are comeing together to create burn in some form. What does the engine need to continue firing and running? Timing. As in, the correct valves opening and closing at the proper time. This is just me thinking out loud, I don't even know how to tell when a cylinder is at TDC on compression or exhaust, but I know if the spark fires when the exhaust valve is open, it will cause a backfire because you are igniting the unburnt fuel after the power stroke. hmm, think about that. Intake brings in air and fuel. Compression squishes it, at the squishiest point, the spark fires and starts the power stroke, which makes the engine continue revolving.

 

[Caleb]

Think about this. We have spark, we have fuel, and both are comeing together to create burn in some form. What does the engine need to continue firing and running? Timing. As in, the correct valves opening and closing at the proper time. This is just me thinking out loud, I don't even know how to tell when a cylinder is at TDC on compression or exhaust, but I know if the spark fires when the exhaust valve is open, it will cause a backfire because you are igniting the unburnt fuel after the power stroke. hmm, think about that. Intake brings in air and fuel. Compression squishes it, at the squishiest point, the spark fires and starts the power stroke, which makes the engine continue revolving.

I need to figure out if it has a weird firing order or something...this is a Napa Reman so who knows what going on inside it...I agree on your thought process though...

 

[gtidrivr]

Think about this. We have spark, we have fuel, and both are comeing together to create burn in some form. What does the engine need to continue firing and running? Timing. As in, the correct valves opening and closing at the proper time. This is just me thinking out loud, I don't even know how to tell when a cylinder is at TDC on compression or exhaust, but I know if the spark fires when the exhaust valve is open, it will cause a backfire because you are igniting the unburnt fuel after the power stroke. hmm, think about that. Intake brings in air and fuel. Compression squishes it, at the squishiest point, the spark fires and starts the power stroke, which makes the engine continue revolving.

From what I have read this sounds like a problem Chad Vandall had with his rig. He changed his throttle body and wha la, presto, that was it! Its worth a shot, how long could it really take????

 

[JeeperG]

Just stick your finger in the right hole to Find TDC

 

[Caleb]

From what I have read this sounds like a problem Chad Vandall had with his rig. He changed his throttle body and wha la, presto, that was it! Its worth a shot, how long could it really take????

to change a throttle body about 10 mins, but to go buy one (junk yard or whatever) is gonna cost me more than I have right now (zero) :-\ anyone have a spare TB I could try?

 

[Hickey]

Just stick your finger in the right hole to Find TDC

On which stroke? I knew about the hole. I always look through the spark plug hole.

 

[JeeperG]

On which stroke? I knew about the hole. I always look through the spark plug hole.

Spark plug hole, Top of Compression Stroke on the number one... Works best with a helper or a switch you can hook up to the starter to bump it yourself.

 

[Caleb]

On which stroke? I knew about the hole. I always look through the spark plug hole.

on the compression stroke you will feel it blowing air out on the intake stroke you will feel the hole sucking...

 

[JeeperG]

So basically when you no longer feel your finger holding air from escaping and piston starts to pull finger back in, around that area...

 

[Hickey]

on the compression stroke you will feel it blowing air out on the intake stroke you will feel the hole sucking...

It will also blow on the exhaust stroke, the difference is, the exhaust valve is open so the spent gases can escape... or at least that is the way I see it in my tiny brain.

 

[Hickey]

Oh, here is a thought. Did you mess with the timing chain or gears or cam?

 

[Caleb]

Oh, here is a thought. Did you mess with the timing chain or gears or cam?

I thought about changing the chain to gears but I never did (ran out of money too soon)...so nope, they never got touched either...I dont think I would dare change the cam by myself

 

[JeeperG]

Did you check the Hypoproofadupulator?

 

[Caleb]

It will also blow on the exhaust stroke, the difference is, the exhaust valve is open so the spent gases can escape... or at least that is the way I see it in my tiny brain.

what I always have done is watch the timing mark on the crank and when its getting close to TDC you feel and if its blowing then its the compression stroke, if its sucking its intake...it may be wrong but thats how I ahve always done it (someone please correct me so I can do it the correct way)

 

[Greg]

Caleb... what's your address? I'll come by in the morning.

Not that I can guarentee we'll get it running, but I've been in this very situation a couple times... experience is handy. But I'm telling ya.... the Dist. is Bass-Ackwards.