got a 89 it will start and idle fine but as soon as you give it gas it cuts off. checked the ecu and the only code is 14 (speed sensor) the air flow sensor is good and the tps has been replaced...what could it be?

 

it could be a million different things, need more details. what's it do when you give it gas? does it rev then rpm dips and shudders then cuts off?

 

you can floor it and it shudders if you try to ease in the gas it just cuts off. hold it on the floor and it shudders around 3000 rpm

 

vacuum lines, maf, injectors, 02 sensor, check those out first.

 

wouldn't the o2 send the ecu a code and if not how do i check it...all the lines are hooked up and the maf is good, already checked those.

 

and whats the best way to check the injectors

 

pull them out. Injector o-rings could be the culprit

 

O2 has nothing to do with it........... i didn't run one for the last 3ish years.

OBD1


I didn't want the O2 messing with my tune at any point.

needs more info

 

also consider ecu, could be bad.

 

I would think if his ecu is bad the car wouldn't start...?

 

Yeah it could still start. Def check injectors and o-rings. Check the resistance on the injectors to make sure they are the same all the way down.

 

........... yeaup ECU's are funny characters.

do an ECU diagnostic OP..... there are direction in the how to section.

 

checked the codes on the ecu only one that comes up is vehicle speed sensor

 

re check all couplers and check you AICV

 

if it starts and idles fine you can automatically ignore half of the posts so far. i wont say what half though. what i'd like to know is when the problem started and if you have checked for codes since you replaced the tps. i have more questions but these two will do for now.