2002 5.7l GI fuel/timing/or firing issue?

[jeremybethune]

motor is an 02 but new long block installed 2 years ago. Motor has 50 hrs overall =. Replaced fuel pumps, filter, injectors, throttle pos sensor and still wont run worth a crap. distributor and plug wires are most likly original ones. it idles great then when you put it in gear and start to give more throttle it starts to die or backfire thru intake. if you slowly ease the throttle it will rev up to about 2900rpm then shut off or sputter. when you pull back to neutral it will continue to idle then die when you put in gear. serial number on engine is 4202032980

 

[alldodge]

Howdy
The serial number is for the drive. It happens quite often, who ever does the stamping of the tag, they mix up the numbers. Says its for a SX-M drive

Have you checked fuel pump pressure?

 

[jeremybethune]

not since replacing both pumps

 

[jeremybethune]

the serial number tag reads as follows

5.7gi-a
4012055490
3869117

 

[alldodge]

Thanks the serial number shows up

You have the Delco EST ignition which is pretty stable

I would check fuel pressure just to know if it can be ruled out

 

[jeremybethune]

ok what are the numbers on the pressure

 

[alldodge]

Edit: thats wrong be right back

 

[alldodge]

VP chart
Note low and high pressures

 

[jeremybethune]

thanks will get back to you

 

[jeremybethune]

I just bought new pumps from quantum fuel systems. if its not the fuel pump where should i look next

 

[alldodge]

The regulator controls fuel pressure. If pressure is good I would ask where did you get the injectors, amazon or ebay maybe? If so that could be the problem

 

[jeremybethune]

fuel pressure @ idle on high side was 30 psi low side was 14 psi

 

[jeremybethune]

i do not know where injectors were bought. im about to change the dist cap and rotor button and wires

 

[alldodge]

Fuel pressure looks ok, was this running?

 

[jeremybethune]

yes at idle. Changed distributor just now and wires and rotor button. still has same problem. if its easire to call me my number is 256-717-9827

 

[alldodge]

Might call but you don't want your number posted, use PM's to do that. BOT's troll these places

Connect voltmeter to +side of coil and then turn key ON, try to Start and see if power stays