BUILD THREAD 88 Monte SS to TPI

[Injectedcutty]

Is it showing any fuel pressure during the pump cycle of 2-3 seconds? Is your TPS and IAC calibrated right? Check TPS with a voltmeter...closed it should read 0V, all the way open will read 5V. Is the dizzy hooked up right?

 

[SSClassic]

i checked injector leads,switched power with key is good & pulses when cranking,im going bald from scratching my head on this one

 

[Turbolq4]

Firing order correct? Distributor in the right place? You say the injectors are pulsing, can you see fuel? Unhook the fuel line, cover it with a rag a make a mess. If no fuel then you have a blockage or something is disconnected or hasn't primed. Think simple and the complicated stuff tends to fall in line.

 

[SSClassic]

Firing order correct? Distributor in the right place? You say the injectors are pulsing, can you see fuel? Unhook the fuel line, cover it with a rag a make a mess. If no fuel then you have a blockage or something is disconnected or hasn't primed. Think simple and the complicated stuff tends to fall in line.

yep triple checked firing order when i put the new wires on,there is a chance the dist is out 180 cause my buddy dropped that in.i took off the return line and put it in a bottle & run the prime cycle & there is plenty of fuel,no chance that the lines are wrong cause they are 3/8-5/16-1/4. seems as though the injectors are just not opening cause theres on fuel odor in oil & dry plugs

 

[Turbolq4]

Crank or cam position sensor giving you fits? It uses these to generate an injector pulse.

 

[olds307 and 403]

Supposedly these TPI motors were nearly put in the SS from the factory. I never understood why GM didn't put the TPI motors in trucks. The TPI intake was designed for the 305, so the 350 only put out 245 hp but 345 ft/lbs of torque, perfect for a truck. With a different cam profile, they could have had the best gas truck motor available for those years. Compare that to the overrated 210hp and 300 ft/lbs from the TBI. Dodge had more at least 20 more hp and nearly the same torque from the 318, the 360, same 20+ hp but 30 more ft/lbs. The 5.8 Ford matched hp, in reality no doubt had more plus an additional 25 ft/lbs of torque.

 

[SSClassic]

Crank or cam position sensor giving you fits? It uses these to generate an injector pulse.

neither of these sensors on the TPI engine,so what determines these values? VSS?

 

[Injectedcutty]

Starting to make me wonder if the injector driver(inside the ecm) has taken a poo. The VSS shouldn't have any effect on this issue.
Do you have the VATS disabled?

 

[SSClassic]

Starting to make me wonder if the injector driver(inside the ecm) has taken a poo. The VSS shouldn't have any effect on this issue.
Do you have the VATS disabled?

yes VATS deleted,custom chip on a piggyback adaptor,i dont understand i i have the pulses but the injectors just dont open,new injectors & i also tried 150k injectors with the same outcome,what replaces the cam/crank sensors on these motors.something has to send a signal to the ecm to tell it that its cranking

 

[Streetbu]

Distributor pickup is the crank sensor on a toilet engine...