BoOsT-CrAz

Whats up cl I have another issue I need ur help with, I acquired another sc its a 95 w a 2jzgte swap, only a big front mount and an sc400 fuel pump. Im triin to fix all the bugs before I add performance,

When the car is cold it starts right up n runs perfect for as long as I want to let it idle (havent put on the road yet for more then 15 mins) after it warms up it has low spark n inj pulse but if I spray ether into the brake booster vac line it fires right back up with no issues, no check engine or anything and I have tried to find anything. Any help will be greatly appreciated

Bankswood

Had the exact same problem when I first got my 400. It is definitely a bad fuel ecu. Either replace it or even better do the fuel pump ecu mod. After chasing the problem trying everything else, I did the mod and it has worked great since

BoOsT-CrAz

So I did the mod today and no change, car starts right up when cold n after running even 5 mins after its shut off will not restart unless I spray something in the brake booster vac line, also when triin to restart has low spark n fp but when I spray ether in the vac line starts right up n runs with no issues, when I turn the key on I canbhear the pump running, but seems to continuously run

FlowFrom95

CHeck the fuses under the hood. may just need some good ol cleaning

Vrank

iTrader: (4)

I'd be looking at the 2 wire coolant temp sensor. I'd bet it **** the bed.

BoOsT-CrAz

But the car never get even close to operating temp?

BoOsT-CrAz

I have check both n no difference this is piaaing me off, I am 99% sure its a usdm engine n comp but have no more ideas

apsykes

second the coolant temp sensor, I believe there's one way to test it, disconnect the two wire coolant temp sensor and try it, if it starts up the sensor is tricking the ecu in wrong parameters.

BoOsT-CrAz

ok i will try that and see, im assuming the one on the water neck? i will hopefully get a break in the pouring rain we are getting and try it! Thanks

BoOsT-CrAz

started the car and after half way above the first line i shut it off and disconeccted the coolent temp sensor (2wire) and tried to start again and nothing it doesnt even try to start just cranks