rb20 will not turn over

[slidesquad240]

my rb will not turn over i have power at the dash headlights ect but my fuel pump is not coming on nor the red light on the ecu this car ran the last time i started it up??? any help would be great please!

[Couped_up'd]

Check your main interfaces' by the battery, make sure they are pluged in.

If that does not work
Check if you have power going to the ecu

If that does not work
try using another rb20 ecu to start it up.

[slidesquad240]

the batterys connections are good. how do i test for power to the ecu?

[Couped_up'd]

the batterys connections are good. how do i test for power to the ecu?


I did not say battery connections. I said the 2 main interfaces by the battery. One is brown, the other is grey. Make sure they are pluged in.

Engine|battery|plugs|chassis <--that is the order to find the plugs.

Also, there should be a wire from the rb converted harness that goes to either the battery, or 2 white wires off the battery. Make sure that is conected too. That is ecu power

You already tested if the ecu has power. The light inside the ecu should light up if it has power.

I would check those connections, then move on to using someones ecu.

[slidesquad240]

oh gotcha yeah all that stuff seems to be ok i dont know anybody with a ecu i can use

[slidesquad240]

i also have a fan on a switch and that doesnt turn on either????!!?

[Couped_up'd]

i also have a fan on a switch and that doesnt turn on either????!!?

Do you have 12v at the battery? please check that. Make sure there is 12v on the battery. With a volt tester.

If you check that, and it does not have 12v. You fix it. Then check when the car is running with a volt tester. Make sure the volt read about 13v+ when the car is running.

[slidesquad240]

yessir battery has 12v but doesnt start still

[Couped_up'd]

yessir battery has 12v but doesnt start still


Its cranks but no start?

[slidesquad240]

nope doesnt turn over and the fuel pump isnt coming on either

[Couped_up'd]

The cable going to the starter, make sure it is all good and conected. Also there is a little wire on the starter to. Make sure you have the big wire and the little wire on the starter.

[slidesquad240]

Yea man everythingds hooked up like I said I drove the car about 2 months ago and now it randomly won't start which makes no sense to me

[roadster6909]

Check if u got power to starter, Make sure your main engine ground is connected, had the same problem, connected it correctly and walla. Good luck.

[slidesquad240]

There's no power to the starter and my batterys in the trunk but the ground is good

[slidesquad240]

finally got a chance to work on my car and i noticed there was a plug that was disconnected. im not sure what the plug is for but its right above the ecu so hooked that back up and turn the key to the on position fuel pump primes ecu comes on then i went to turn it over it makes a click and the red light was off on the ecu so now im getting confused so i disconnected the battery then put it back on and after doin that about 3 times the ecu and fuel pump came back on but same when i went to turn it over click then everythings off again? i really am a noob when it comes to wiring and electrical so any help is awesome thanks guys

[thursdaymike]

if you lose power when trying to turn it over it is probably a bad battery connection or bad ground where the battery goes to the chassis. Also i had a problem where my headlights and dashlights were on but nothing else with my sr. try looking in the fuse box under the hood foor one labeled eng. i think. replace it and my problem was solved. also happened to a friend of mine. its a big square one. i think its brown or green.

[holemilk00]

i also have a fan on a switch and that doesnt turn on either????!!?
How recent was this addition? Where did you get power from for this? It sounds like you're tripping a relay when you get power and try to start the car.

[slidesquad240]

How recent was this addition? Where did you get power from for this? It sounds like you're tripping a relay when you get power and try to start the car.

Funny thing is now the fan turns on but I'm getting power from the positive battery cable idk if that's legit spot had a friend hook it up. But the grounds seem fine I was told to check my ignition switch?

[holemilk00]

Where did you ground the fan?

[slidesquad240]

To the chassis

[slidesquad240]

im goin to check all the fuses and relays under the hood tomorro cars stiill not running