I have 1000 miles on my rebuilt engine. I had this problem before I got it though. Every emissions control part has been removed. Every idle control has also been removed. When I start it its obviously hard to keep running until it has about .1 V on the o2 sensor. After it starts idling it will hold a sort of eratic 800 rpm idle. However, if I blip the throttle it will go up to 1200rpm-1500 rpm and stay there until I load the engine with the clutch (putting it in 4th and slipping the clutch). It will NOT start hot without cutting fuel but starts every time cold. I tested the ECU and here are my results:



ECU Test Results:

(Tested with ignition on, engine not running (cold), Battery was apparently low - battery measured at 9.33V)



1G - Neutral Switch - 9.28 In/ 0 Out

1H - Water Temp Switch - 3.34

1I - 5th Gear Switch - 9.41 In/0 Out

1J - Initial Set Coupler - 4.38

1L - Clutch Switch - 0 Released / 9.01 Depressed

1M - Coil With Igniter (trailing) - .76

1N - Crank Angle Sensor G1 -

1O - Mileage Switch - .02

1P - Crank Angle Sensor G2 - .67

1Q - Crank Angle Sensor Ne2 - .67

1R - Knock Control Unit - 3.38

1T - Crank Angle Sensor Ne1 - .67

1U - IGs-T - 4.31

1V - IGT-L - 0

1W - Heat Hazard Sensor - .96

1X - IGT-T - 0

2A - V Ref - 5.0

2B - Pressure Sensor - 2.27

2C - Ground - .03

2D - O2 Sensor - .075

2E - AFM - 4.0

2F - VR - 1.74

2G - TPS - .95

2H - Atmosphere pressure Sensor - 3.9

2I - Water Thermo Senor - 2.66

2J - AFM intake air temp - 2.88

2L - Intake Air temp sensor inlet pipe - 3.9

3C - Injector Rear - 9.27

3D - Fuel Pump Resistor Relay - 9.2

3F - Injector Rear Secondary - 9.22

3H - Injector Front Primary - 9.21

3I - Main Relay - 9.19

3J - Battery - 9.24





I tested it with the battery charged and car running...all the 9s became ~13s



pressure sensor was still 2.27 (out of spec) FCD maybe?

IGT-L was.7

IGs-T 2.1

water thermo .33

AFM temp - 2.49

intake pipe temp sensor - 3.84 (out of spec)



5th gear switch was 12V OUT of 5th gear...whats with that?



fuel pump resistor - 1.14



injector front primary 12.89





I replaced the intake temp sensor. My main question is about the 5th gear results. The FSM says I should see 12+ volts in 5th however I am seeing 12+V everywhere but 5th. Help Please https://www.nopistons.com/forums/pub...IR#>/smile.png

i would also look for vacuum leaks



mike

No vac leaks that Ive been able to find. The car doesnt pull the amount of vac that I would like to see though. Its totally bareblock so there are only 3 vac lines off the manifold.

did you check the fuel injector grommets and orings ? might have a vacuum leak there

Im going out to check them now. I was going to replace them with the pig tails that need to be replaced b/c theyre dry rotted.

how exactly do you know if the grommets are good? I know the o rings are or it would be leaking...

O-rings and gromments are cheap!!! Just replace them. BASIC BASICS BASICS

Ive replaced everything...all the wear items have been replaced with new parts... just curious as to whether the new stuff could be bad

bump

Did you lubricate the new o-rings with a slight amount of motor oil when installing them?