1997 Tacoma 2.7 Won’t start

I have a 1997 Toyota Tacoma 2.7 that will not start unless you spray fuel into the intake with a squirt bottle. It has 40-43 psi on the fuel rail while turning over and seems to be firing good. I have replaced the spark plugs, fuel injectors and the fuel pressure regulator. I verified 12v+ on all four injectors and can see the negative signal from the ecm telling injector to spray but it seems weak. I tried to test the three wire crank shaft sensor assuming one is ground one is 12v and the third sends a reduced voltage back to the ecm but I can not see voltage on the plug. I have seen several people with the same issues online but no post if the issue was ever found. Any assistance is appreciated.

 

Check the dash light for codes. the ECU is quick to throw one if something is disconnected. ECT sensor can cause a no start. IAT sensor as well. Check all electrical connections.

 

Almost sounds like a fuel pump. Does it stay started once you get it started?

 

The reason why you cannot see voltage at the plug is because the computer will not allow the plugs to fire. So why?

 

I have checked the connections and all seem to be good. I’m currently trying to get the codes off the dash by jumpering e1 and te1 on the diagnostic port with no luck. The videos I found on YouTube are for 1995 for this process so is it different for the 1997? Thanks for help!

 

Get a cheap reader and plug it into the diagnostic port or go to an autozone and they will read the codes for you.

 

To the fuel pump question it does not stay running and the fuel pressure remains 40-43 psi on the fuel rail.

 

Ok I checked at my local auto parts store and they do not have a obd1 reader so I will order one offline.

 

OBD II reader not OBD I

 

I have a cheap obd2 reader but this vehicle is equipped with a obd1 diagnostic port.

 

Have you looked under the dashboard to the right of steering wheel ?

 

My apologies! As soon as I seen the port under the hood I assumed that was the only one on the truck. Will pull the codes now.

 

The only code is a po115 engine coolant temperature sensor. The battery was dead yesterday and the truck has been on a charger since this morning so it possibly erased the codes?.

 

Sometimes the engine coolant temp sensor gets damaged at the firewall. Check for a good connection and serviceability of the ECT.
Yes a dead battery can get codes erased.

 

The coolant sensor was unplugged! Truck fired right up but is very sluggish like it’s starving for fuel. Will drive it more tomorrow to see if it will trigger a different code. Thanks for the help so far!