Hard start

[RobE30]

After my 87 (173 ecu) IS sits for a few days, it's been starting harder and harder, ie. it takes quite awhile before it catches and starts. Once it starts there is a small puff of "black" smoke then life is fine. Does anyone have a suggestion where I should start? She had a tune up a month or so ago (plugs, cap rotor, coolant temp sensor etc) so I'm thinking that is all fine

[jlevie]

The black smoke might be a sign of a flooded engine, which in this case could be a sign of injectors leaking. When the car is parked enough gas leaks into the engine to flood it.

[RobE30]

Sounds like a good excuse to upgrade to bigger injectors to go w/ my cam etc:twisted:

[bimmer630]

Sounds like a good excuse to upgrade to bigger injectors to go w/ my cam etc:twisted:

Are you selling a cam?

I just put some injectors in my M20 for the same reason, it was hard to start after sitting for a while.. It starts great now and idles alot smoother. I used some injectors from an M30, they are the green injectors, but i dont really know what the flowrate is. can anybody shed some light on the different injectors and what the color codes mean? I have read that the m20 comes with type I injectors and the type II and III had a better spray pattern and were available on M30 and M50 engines

[nando]

M30 are 19# AFAIK

don't know if they are design 1 (single pintle, shitty spray pattern) or design II/III (4 pintle). M50 injectors are definitely 4 pintle.

[RobE30]

Are you selling a cam?

I just put some injectors in my M20 for the same reason, it was hard to start after sitting for a while.. It starts great now and idles alot smoother. I used some injectors from an M30, they are the green injectors, but i dont really know what the flowrate is. can anybody shed some light on the different injectors and what the color codes mean? I have read that the m20 comes with type I injectors and the type II and III had a better spray pattern and were available on M30 and M50 engines

No I'm not selling a cam. I'm currently running a schrick 282/274 (i think) w/ stock m20 injectors and a 173 ecu, IE shorty headers, "custom" mid pipe and supersprint exhaust. I am on the fence (still) about what size injectors and software to go w/ and this issue might be the one that forces me to shit or get off the pot....

[bimmer630]

what is the # rating of the stock m20 injectors? dont know if its just me beating on the car alot this week but ive noticed im going through gas faster than usual

[free]

I believe the stock injectors are 14.5#...

[E30_fiend]

I believe the stock injectors are 14.5#...

indeed