sr20det wont start but runs fine when pop started..plzzz help

[mass90240sx]

ive been working on this for a while now and the things that ive replaced consist of a brand new wiring harness properly put together a new maf new fuel regulator temp sensor and emptied old gas replaced with new.its getting fuel spark and compression. also when i pop start the car it will run perfect.. im completely stuck on this subject anyone with help would be greatly appreciated

[240life]

when you turn the key does anything happen? If the answer is no the ground on your starter is probably off happens to me at least 1 time a week

[the converted]

Umm, the ground for the starter is the engine block. New swap? Manual conversion? Could be the inhibit relay in the wrong position.

[240life]

well then the little tab on the solenoid that has a push on connection sometimes comes loose

[mass90240sx]

well the funny thing is when i turn the key it cranks and cranks but wont fire it has a new battery its getting fuel and spark..any more ideas?

[J240sx]

Any video to hear what it sounds like? Timing ok?

[mass90240sx]

no video but im guessing the timing is good because when i pop start it it runs perfect..is that wrong

[the converted]

Check your ignition switch to make sure that the power isn't cutting out to everything else when you are trying to start the car. I have seen it a few times before, and that is what it is sounding like from your last description.

[mass90240sx]

ive already installed a switch getting 12v to make sure thats its getting the right amount of power so i know this cant be the problem either??anything else i should look for..

[the converted]

Exactly what wires did you connect this switch to?

[mass90240sx]

i measured for voltage to a wire under my dash and it was 12v so i soldered another wire in to insure a good connection for both and installed the switch not sure what exact wire but its getting 12v for sure.

[the converted]

Sounds like you may have gotten the accessory wire. It turns off when the car is in the cranking position.

[mass90240sx]

ive measured voltage when the car was cranking just to make sure that it was getting 12v and it is..so i dont think it could be that?

[the converted]

If it measured 12v during crank, that should be fine. It's strange though, everything is pointing to no power to the ignition circuit during cranking.

[mass90240sx]

thats exactly what i thought thats why its stumping me im stuck ive been working on this problem for a while??any more ideass

[the converted]

I wish you were closer, I would just come over with a tester and go to town. Other than that, start tracing ignition wires from the ecu back and find out where it is loosing power from.

[mass90240sx]

ya ive done that already to and its getting power throughout all ignition wires..im not sure were to look from there?

[the converted]

Check the power supply for the injectors. It comes off a plug up by the battery, and the wiring could have been mixed up accidentally. Has this car ever started normally? Who did the wiring conversion?

[mass90240sx]

the car was starting normally when i first bought it then slowly it got harder and harder to start as time went on so i bought a new harness and installed it with my cousin( he wired his 240 by himself a few times) and still the same problem.. the car runs fine if i pop start it though i dont get it??

[mass90240sx]

Do you have any more ideas that would be helpful to me ? please comment back with something anyone

[Kalypso]

seems like the brushes on the starter could be worn.

havent read the thread entirely to see if thats mentioned, but its the first thought.

[ballinnmiami240sx]

Have you check you spark plugs. GAPPED? .028

What are you compression numbers?

[Kalypso]

def not the starter... sorry.

[mass90240sx]

yes i just put new spark plugs in gapped correctly at .28 and my compression hasnt been checked lately how would i go about doing that myself? or would i be better off bringing it to a known good shop?

[Kalypso]

its very easy to do... do a search, you'll find a tutorial real quick.

[mass90240sx]

thanks ill get abck to you and let you know how things went thanks again

[Brendant4]

Is the ECU throwing any codes?

[dhballa8588]

i had what seemed to be the same problem a couple of months ago...and it turned out to be the cas...check that

[mass90240sx]

the ecus not throwin any codes just a code 55. and for the cas i havent checked that but would the car still run correctly if it were to be pop started instead of just being turned over normally??

[Wiring Specialties]

I did not see you try the start signal check. If the ECU is not seeing a Start Signal at the time the key is turned on, the engine will not fire.

Check the start signal for +12V (orange wire on the dash plug). If its not going to 12V, than this should fix the problem.

Give it a go and let us know how it goes.

ThanksYury