onthagozc

it will start fine before driving, after stopping to get gas it wont start. checked main relay, coil igniter. flawless. checked for codes got solid cel. replaced with new ecu and same problem. has anyone had this problem. this is a 93 civic d15b7.

peaseapea

Does it try to turn over or just click? Or nothing at all?

onthagozc

it will turn over and you can smell the fuel.

K20EF8Dx

the sympton with the car goes as follows

- Tried 3 different main relays
- cranks fast just will not start when car is at operating temp
- tested spark with spark tester fine, also have tried different coils and ignitors
- Getting plenty of fuel you can smell it and hear the pump
- tried 2 different ecu's
- pop clutch it will struggle but it will start

Starts just fine cold but at operating temp when you shut it off and go to restart it the issue comes into play. Car also drives great no matter the temp if its at operating or not.

onthagozc

thanks steve i am a little tired from the headache today and reading

K20EF8Dx

no problem!!

Former User

Does the CEL remain on steady with and without the service connector jumped? If so, have you cleaned and tightened the important ground wire attached to the thermostat housing? Another possibility is a bad ignition switch with the problem being the ON(III) position.

onthagozc

cel only comes on when jumped and have checked the ignition harness. have checked the tstat ground but havent cleaned it. will try

Former User

Did you run all of the continuity tests for the ON(III) position. Note that these tests must be done when the engine won't start. The ability to push start the engine suggests an intermittent ON(III) problem.

onthagozc

i checked them when it wasnt starting. i will recheck tomorrow. i think i also have an extra switch to try with

onthagozc

hey just to make sure on checking the continuity ON lll they all 3 have have to be checked at the same time correct

Former User

Checked continuity between pairs of terminals in all permutations.

onthagozc

so 1-2 1-3 2-3 just want to make sure on this so i know im doing it right. thanks for all the help

Former User

Correct.

Keep in mind that the problem is intermittent, so the tests must be done when the engine won't start.

onthagozc

i usually drive around the block and that usually makes go into no start.

onthagozc

ignition switch tested fine. i did notice that the starter cut relay was buzzing. does anyone have a diagram fo testing this relay. the buzzing is a good sign but want to check before buying a part

onthagozc

checked the relay and it was good.

System Lord

iTrader: (1)

I have a similar issue but if I had spark mine would fire what makes you think that your relay works? Mine clicks three times I was told that makes it good?

onthagozc

did the tests in service manual

System Lord

iTrader: (1)

cool! Im still gona try a good relay later on tonight tho. What about that crank sensor? Thats next on my list

onthagozc

unless i can come up with something new to check i will be going through all of the sensors to see if i can find something.

System Lord

iTrader: (1)

Well if you ever find out what it is let me know!

onthagozc

will do. hoping some one on here has had this problem and can add some direction

Former User

When the engine won't start, you can still reliably push start the engine, right? If so, check whether the main relay fails to get battery voltage through the starter circuit on the BLU/WHT wire with the key in the ON(III) position.

System Lord

iTrader: (1)

hey ronj are the 3 clicks accurate for a good relay?