So i have a 08 tc and its been boosted for almost a year. the problem is that after driving and the motors all warmed up it just doesnt want to start back up. i could go into a store and come back out and it takes forever and a day to crank back over. i thought it could be because i was tuned at 93 octane and now im stationed in CA and now i use 91. i was wondering if any other boosted TCs have this problem? and if theres anything i can do to fix it... heres my set up


Garrett Turbo .50 Trim,
Tial 38mm Wastegate,
Custom 3" Intake Pipe,
Custom 2.5" Intercooler Piping & Downpipe, & Recirculated Dump Tube
550cc injectors
aem fic, tuned by PTuning
custom 2.5 inch turbo back exhaust,

 

tried changing plugs?

 

Put brand new plugs in about 3 weeks ago

 

I have a 08 boosted tc as well and ive been boosted for almost a yr now with the same exact problem. I have done everything i could to rix this problem but nothing has worked for me. I would really like to hear some input on this so i go in the right direction to get this taken care of

 

I'm going to be buying a new descendent kit soon and tuning it out here in CA so hopefully this doesn't continue.

 

But I would still love to know what's wrong with my car now

 

Where about in cali? Why replace your old turbo kit?

Have you tested your battery recently? Start there if its not that it could be the starter. I'm in the pendleton area and my car had trouble starting every now and again too.

Sent from my DROID incredible

 

Im check that out tomorrow at work. And I work in Coronado about two hours away

 

mines is the same way. it takes about 3 cranks and each crank takes about 5 seconds...and sometimes it freaking backfires and its so embarassing, it makes the people stop and look lol. yes its really loud i have the humangous HKS exhaust with 3 in straight pipe. but it does start though after couple 5 second cranks grrrrr.

this never happened to me before when I had the unichip. then when i build my motor (head, block, trans) and switched to AEM FIC, tuner said its not the tune but just the way it is he thinks, cuz he cant figure out why. he has reasons that toyotas and scions computer ar fighting the against the aem fic, and you need a standalone - it will fix the problem. he also recommended me to get the hydra, which will cost me about $2700 installed and fully tuned. Im still undecided what to do.

 

i had the same exact issue but i had my battery in the trunk with 4gauge wire, aparrently my battery is bad so we put it back under the hood. still takes a couple seconds to start but fires up . check your voltage from the starter while car is cranking and try to compare it with another tc if possible. thats wat i did and took car of the issue.

 

Thanks man I'll give it a try

 

Try hitting the gas before turning it off(rev to like 2.5k and turn off). This will clear the cylinders and keep the plugs from getting fouled.

 

I have this problem everyday with the zpi stage 1 kit, tuned. From what ive come to, it tends to dump fuel on start up for some reason, so all i do is barely hold open the throttle while i crank it over and let off as soon as it starts. Now it starts up right away.

I think it has something to do with it being a draw thru set up.

 

can anyone confirm what voltage the battery should be pulling at start up? mine pulls about 13.4 and then goes up to 14.2

 

if i remember correctly that sounds about right. sounds like where thendawgs was wen we compared mine to his.

 

i dont think it has anything to do w the starter/or battery voltage. my 07 does the same exact thing. on a cold start it fires right up, but if i drive, shut it off, come back and start it up it takes a few times to fire up. i have a feeling that it has something to do w the fact that we have returnless fuel systems. i think the fuel is sitting in the cylinders and needs to clear out. i think the best person the ask about this is paul from dezod or one of the scion specialist. but this is the only logical theory i can think of.

on top of this ur adding more fuel that what the ecu is used to seeing so it may try to compensate and lean it out but cant keep up. im having the same issue with my aem fic. im strongly considering getting rid of it and going with the greddy ultimate.

 

i doubt this is it i dont have a return less fuel setup anymore. and while he may not have his battery in his trunk like i did but the reason my car wouldnt start on hot start was due to the high heat out here in oklahoma drawing to many volts and even tho i had a 4 gauge battery wire it still wasnt enough. so paul may not be the best answer for this its a trial and error thing. so many factors.

 

This hot engine startup problem is a well known FIC issue. I had the exact same problem and it went away the moment I removed the FIC. I think it may have to do with the FIC not picking up the crk and/or cam signals properly.

 

that could be another option

 

im just givin him another option. i didnt say that was the exact cause, but just from being in the auto business and basic mechanics 101, i would rule out the battery being the fault due to the fact that the car is still starting and if the battery isnt modified like urs. from what hes describing it doesnt sound like a voltage issue. it sounds more of a fic or fuel issue.