been having hard start issues when car sits

[enriquez2000]

ive been having issues with car no starting first try after sitting... cold weather makes it worse but if it sits for 8hrs while i work it will take 2 to 3 turnovers, colder mornings can be as many as 6.

I adjusted some dead time and my mafcomp and its a bit better but not firing up like it was after e85 and injector swap. i can only try it every few hours, once it reaches temps its fine.

I can see on my log the crank compensation will have my fuel as high as 34% and my afrs will be 7.5 until it stops... not sure whats going on there. That flooding might be the problem. 7.5 on e85 would be washing out cylinders. Once the compensation stops it goes to 14s where it should be.. any way here is a log.. advice appreciated.

 

[pauleyman]

Check for a leaky injector. Easy check is after car sits pull the plugs and smell each one. If any smell like fuel you have your problem. Isssue is you have no fuel pressure at startup and one cylinder has a little bit of fuel in it. Car will stuuter and run like crap for 3 or tries then run like normal after the 5th or 6th try.

 

[enriquez2000]

Check for a leaky injector. Easy check is after car sits pull the plugs and smell each one. If any smell like fuel you have your problem. Isssue is you have no fuel pressure at startup and one cylinder has a little bit of fuel in it. Car will stuuter and run like crap for 3 or tries then run like normal after the 5th or 6th try.

Ill try that... i had them in my accord for a year before swapping here but who knows. The acoord is a weekend warrior. This fires up daily.

 

[enriquez2000]

Ok so its a no go on the plug odor. Plugs are fresh(yesterday) and show no sizes of rich condition on the old or new. E85 should be a strong odor on plug if leaking i would think.

 

[luv2rallye]

ive been having issues with car no starting first try after sitting...

Also check for a leaky fuel pressure regulator. A good one should keep pressure there for days. It could also be a leaking injector or leaky fuel pump check valve (if lack of fuel pressure is the problem).

 

[enriquez2000]

My aeromotive fpr shows zero pressure after sitting for a few hours..

If you look at log though its 7.5afr for the first 28sec

 

[Archer Fabrications]

Your offsets are probably wrongnif it's showing 7.5..... Theybdont read that rich

 

[Dsmkauai]

What's base fuel pressure? Wouldn't that need to bump up alittle with e85?

 

[enriquez2000]

What's base fuel pressure? Wouldn't that need to bump up alittle with e85?

Base is 43.5.. it doesnt need to go up you just compensate the global... all that checks out fine.

Your offsets are probably wrongnif it's showing 7.5..... Theybdont read that rich

Its only that first 28sec on the log.. maybe its my wb not reading anything yet?

 

[Archer Fabrications]

If it wasnt reading anything yet itnwouod be lean or stuck at 14. Maybe your sensor is done? Probably not related to your cranking issue though.

 

[enriquez2000]

If it wasnt reading anything yet itnwouod be lean or stuck at 14. Maybe your sensor is done? Probably not related to your cranking issue though.

Ive been killing sensors every 8 or so days.. need to move the sensor down stream a bit. This one is fine. It reads ok after that first weird reading for 28sec.

Im stumped on this one.. i keep adjusting things and seems a bit better but not great. If someone sees anything in my log please let me know. Stupid mistakes have happened before

 

[Archer Fabrications]

Every 8 days? Holy crap how close is it? I had mine in the fromt o2 position on a stock o2 housing for a long time and had sensor go bad every 8 months or so. (Aem)

Do you have any electrical issues?

 

[enriquez2000]

Every 8 days? Holy crap how close is it? I had mine in the fromt o2 position on a stock o2 housing for a long time and had sensor go bad every 8 months or so. (Aem)

Do you have any electrical issues?

No it just started with e85...worked for close to 8months before that. im putting a 2g o2 with a heat sink in. If that doesnt work it goes on DP... but this ines still running fine. Ive gotten quick at changing them out though even when its still hot

 

[enriquez2000]

Whats an acceptable voltage drop on cranking for these cars? Mine goes from 12ish to 10ish when turning. Seems normal to me but not sure in theses cars

 

[Archer Fabrications]

Dead battery. Mine does the same and it should never drop below 13.5 from my understanding

 

[enriquez2000]

Would anyone mind checking.. dead battery would be awesome(not sarcastic)

 

[luv2rallye]

Whats an acceptable voltage drop on cranking for these cars? Mine goes from 12ish to 10ish when turning. Seems normal to me but not sure in theses cars

You need 9.6v minimum AT THE STARTER for it to operate properly. So 10v at the battery would be ok if the cables and connections don't drop more than 0.2v each between battery and starter. While cranking you can measure voltage drop from battery post to it's terminal and from terminal to starter post to find excessive drops (to find poor connections or poor cables). I recommend removing battery terminals, cleaning them (sandpaper on contact surface), and reattaching tight before doing anything.

 

[Archer Fabrications]

well i don't mean its dead but its definitely on its way out.

 

[enriquez2000]

well i don't mean its dead but its definitely on its way out.

So most likely since im at 10.4 in warm weather at battery and the load will drop some to the starter and then again even more if cold it could be its not enough juice?

It doesnt slow crank at all... ill try using a jumper in the morning and see what happens. It would honestly be great if it was the battery instead of injectors.

 

[Archer Fabrications]

well what it should be at is 14v. if it was perfect.

 

[enriquez2000]

well what it should be at is 14v. if it was perfect.

Alternator jumps it to 14.6 ...

 

[luv2rallye]

Stand alone (no alt charging it) fully charged battery voltage with no load is 12.6v.

 

[enriquez2000]

Stand alone (no alt charging it) fully charged battery voltage with no load is 12.6v.

Which is my exact number... then down to 10.4 on crank then up to 14.6 with alternator

 

[Archer Fabrications]

Your alt must be f***ed then drawing current and over charging I'd check it over with a voltmeter

Dead batteries kill alternators though (not that saying yours IS dead) it's also not uncommon with these cars for the alternator to shit themselves

 

[oneslowwdsm]

Whens the last time you changed the coolant temp sensor? If those are unplugged or not working it will cause hard starts.