This is the second time it happened to me.Right after i pump gas into my car ,then try to start it ,the idle is real bad,it just hesitates,trying to go up to normal idle but it doesnt,then it dies out.So i try to start it ,it wont.Then i hit the gas halfway down and crank it and it goes,check engine light pops on,but i half to be on the throttle ,if i let off it would die,so i leave it on throttle for about 20 seconds,turned the car off then on again.Check engine light gone,Then it seems normal,but i know something is up. If someone have this problem before or have an idea what could be wrong please help me out. Oh, my car is a 2000 si ,b16,18g turbo kit ,550 injectors,255 walbro,p06 ecu,tuned with uberdata.Im thinking its a fuel issue(pressure).Maybe it has something to do with me opening my gas lid.Cuz its both times right after i pump gas

 

try taking the gas cap off and see what happen.

 

ive had 2 99-00 si's and have had both do this on various occasions, it only happened with a chipped ecu tho. never had an issue with the stock ecu or aem ems. other than that i was never able to figure it out completely...mine never threw a CEL tho

 

So i guess im not the only one.Someone out there must have figured out a solution for this.Oh and i did open my gas lid and it is normal.........Anyone other opinions?

 

this happens to me at certain gas stations...

this also happens to my roomate who also has a boosted 99 SI

 

Used to happen to me as well, when you are done filling the gas, make sure the cap is closed to the 3 clicks, turn the key to ACC and let the fuel fully prime, wait for the CEL light to go off, and then start the car.

 

disconnect the evap purge solenoid.


running obd2 cars with an obd1 ecu, the evap purge solenoid causes issues after pumping the car up with gas.

this will fix your problem.

 

Evap purge solenoid?Where is that located?
Oh i always give it at least 3 clicks,and i always let the fuel pump prime before start.Maybe ill try the evap solenoid.Someone help me out where its located,a pic will help.Thanks for all the help so far guys.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 99delsol &raquo;</TD></TR><TR><TD CLASS="quote">Evap purge solenoid?Where is that located?
Oh i always give it at least 3 clicks,and i always let the fuel pump prime before start.Maybe ill try the evap solenoid.Someone help me out where its located,a pic will help.Thanks for all the help so far guys.</TD></TR></TABLE>


its usually a black box located on or around the fuel rail/intake manifold

 

Anyone have a pic of this?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 99delsol &raquo;</TD></TR><TR><TD CLASS="quote">Anyone have a pic of this?</TD></TR></TABLE>

i cant find a pic, but located your black canister on your firewall near the battery... trace the rubber hose coming from it to a black sensor on your IM..
the evap purge also is made by denso

 

So do i just disconnect the rubber hose?Or is there a clip that needs to dissconnect?thank

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 99delsol &raquo;</TD></TR><TR><TD CLASS="quote">So do i just disconnect the rubber hose?Or is there a clip that needs to dissconnect?thank</TD></TR></TABLE>


just disconnect the clip, and then tri it out.

when you realize how much this helps, you can disconnect the vacuum hose going to the IM and cap it off

 

what could i use to cap it off?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 99delsol &raquo;</TD></TR><TR><TD CLASS="quote">what could i use to cap it off?</TD></TR></TABLE>
vacuum caps

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by igo4bmx &raquo;</TD></TR><TR><TD CLASS="quote">disconnect the evap purge solenoid.


running obd2 cars with an obd1 ecu, the evap purge solenoid causes issues after pumping the car up with gas.

this will fix your problem.</TD></TR></TABLE>


Thats what i did with my boosted 00si coupe! unplug the clip and your good to go!

 

Thanks for all the help everybody.Im going to try this in the morning

 

Wouldn't using the AEM EMS cause the same issue as it does not control the EVAP functionality?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Muckman &raquo;</TD></TR><TR><TD CLASS="quote">Wouldn't using the AEM EMS cause the same issue as it does not control the EVAP functionality?</TD></TR></TABLE>

The EMS doesn't actuate that wire at all unless it's disabled, I've had 0 problems with the 99-00 cars and the 1050 box. My guess is that the OBD1 ECU is doing something else on that wire, but I'm too lazy to cross reference the diagrams or track down a conversion harness.

 

Your rigt, the OBD1 ECU's have to be doing something funky on that pin. Simply de-activating the system doesnt seem to cause any problems - ie pulling the plug on the solenoid, or running an aftermarket "race" ems like AEM EMS, never any problems.

 

Ok i unplugged it.But it was on my fuel rail,it does say denso.Its right in the middle od my fuel rail right above one of the injectors,its not on the intake manifold.Does that sound right,cuz i ran the hose from the canister and it lead me there.Can someone confirm that i unplugged the right one.Thanks

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 99delsol &raquo;</TD></TR><TR><TD CLASS="quote">Ok i unplugged it.But it was on my fuel rail,it does say denso.Its right in the middle od my fuel rail right above one of the injectors,its not on the intake manifold.Does that sound right,cuz i ran the hose from the canister and it lead me there.Can someone confirm that i unplugged the right one.Thanks</TD></TR></TABLE>

that sounds right

 

Its number 8 if I am not mistaken?

 

this happened to me not too long ago, and I have the similar set up, started off on start ups every now and then, eventually wouldnt start at all. Checked everything from the fuel pump, distributor, injectors, rail ....turned out it was stupid *** autolite platinum plugs

 

Got it.Thanks