sound ok to you guys?

[91turbolaser]

ok im starting to get everything situated with my car. just have a couple tuning questions that im not sure if i should be worried about or not a big deal. ok the first thats really weird is when i log my my fuel trims they all stay right around 100% except for this one... FTR02 is says 100% while wot and hitting the gas, but if im just being really light on the throttle like cruising around barely on it the trim jumps around hits up to 167%. as soon as i hit gas it goes right back to 100% though. also im getting what seems to be quite a bit of timing. as much as 40 degrees. is this ok? my knock count is basically always zero, never above 2 counts. lastly since i installed MAFT the boost level went down a few psi. thought maybe boost leak, still might be, but i adjusted the boost controller a little and it raised boost again. any ideas what caused this. thanks soo much for any help clearing up these questions for me. the knowledge i gain from you guys is fantastic. thanks soo much. matt

[DSM24]

i dont know if this will help you but, i hear that the average advance in timing should be around 5 degrees, i could be wrong, just a damn noob.

[ryanman]

5 degrees is roughly where your BASE timing should be, 40 degrees advance sounds like alot. "Normally" most people are in the 18-23 advance degree range.

[91turbolaser]

hmm i dont know... my logs showing some TIMA in mostly high 20's and mid 30's seems weird. dont know why this is.. maybe my chip or sumthing, is this going to harm my car? also any idea on the FTR02 reading 167% at light thottle? should i not worry about that since the 3 main trims are all around 100%? thanks. matt

[Mirage]

5 degrees is roughly where your BASE timing should be, 40 degrees advance sounds like alot. "Normally" most people are in the 18-23 advance degree range.

Yup. 5 degrees BTDC is what your base timing should be (or close to it). I've seen in excess of 35 degrees while cruising (light throttle, low load).

For WOT pulls, anywhere in the 18-23 seems to make the engine happy.

as for those fuel trims, they should be closer to 100. Seeing 167 tells me that you're super lean in that area. Richen up that area and see if it gets closer to the target 90-110%

Marcus

[sbiggi]

while cruising you will run very high timing advance, this is done on purpose by your computer for fuel economy... the 02trim will also hunt while cruising around under light throttle and at idle, it is a realtime number of what your ecu is doing with your fuel trims

when you "tune" you are tuning wot and that is when you want to watch your timing advance. 23 deg is good if your on race gas, but kinda high for pump gas. I would shoot for 20-21 or so on pump.

[sbiggi]

dang it, yeah Marcus posted while I was typing mine up....

[91turbolaser]

ok thank you very much these posts were extremely helpful. yeah the FTR02 reading is right around 100% while WOT its only on light pedal and cruising that it jumps around a lot and sees a max of 167 but it is jumpy like you said soo i think its probably ok. i do have one more question while im getting such good info... my car is stalling when i try to start it up cold, and its driving junky really hesitant and harsh like elapses time when stomped before it kicks in and just really hesitant. i have done intake leak tests and havnt found any good leaks.. i have one manifold to head bolt that is broken... could this actually cause these hesistating problems? i have a chip programmed for 550's and maft set to 550's as well i assume that would be right so it cant be that. just wondered if anyone thought that broken manifold to head bolt could cause this. sure would be nice if it could:) thanks soo much for all the help today. matt

[sbiggi]

if the chip is mapped for 550's and the maft is set for 550s.... then you should be running lean I would think...

how much have you driven around? the fuel trims take a while to change. I have a hard time believing that you arent running lean with those settings

[91turbolaser]

umm id guess ive actually driven it a total of an hour maybe total time.... no more. sooo should i have the maft set for 450's then? not 550's like are in there in order to act right with the chip programmed for 550's? any comment on broken manifold to head bolt?

[91turbolaser]

soo is there any way the broken manifold to head bolt could be causing the horrible hesitation and harshness. spool time is much longer on my 16g soo slow.

[91turbolaser]

also is there anyplace to buy manifold to head bolts besides the internet. i dont live in CO, unfortunately, any place like napa or somewhere?

[sbiggi]

umm id guess ive actually driven it a total of an hour maybe total time.... no more. sooo should i have the maft set for 450's then? not 550's like are in there in order to act right with the chip programmed for 550's? any comment on broken manifold to head bolt?


yeah the maft should be set around 450's.... it will more then likely need to be changed a little

which stud is broken? exhaust manifold? a preturbe exhaust leak will deffinantly kill spool time, as there is alot of pressure in the exhaust manifold.

[91turbolaser]

its one of my manifold to head studs that is broken... ok ill go set the maft to 450's again... do you think then that this broken manifold to head stud could be causing my really laggy harsh hesitating drive?thanks man. matt

[sbiggi]

its one of my manifold to head studs that is broken... ok ill go set the maft to 450's again... do you think then that this broken manifold to head stud could be causing my really laggy harsh hesitating drive?thanks man. matt

still didnt answer the question.... which manifold? there are 2, intake and exhaust. Any leak any where will cause loss in performance.

[91turbolaser]

oh shoot im soo sorry man.. its my exhaust manifold that has the broken bolt to head. soo if you think it will probably help or hopefully fix completely i will order the bolt tonight.thanks.. matt

[91turbolaser]

by the way setting maft to 450's seemed to help a lot. is it because letting the mas think my injectors are stock allows the injector programmed chip to do its job correctly? thanks

[sbiggi]

by the way setting maft to 450's seemed to help a lot. is it because letting the mas think my injectors are stock allows the injector programmed chip to do its job correctly? thanks

exactly

but, it sounds like you car is hesitating cause it need to be tuned. I would drive it around for a day or two and see where the fuel trims are at, and go from there.

[91turbolaser]

ok ill do exactly that. do you think 2 days or so should be enough time to register proper fuel trims. thanks for all the help man. i appreciate it.

[91turbolaser]

hey by the way i have 550's, AFPR, MAFT, and the keydiver chip. Do you think i should invest in the SAFC for tuning as well as apposed to trying to use maft. i mean originally i figured that the chip would get my maps close enough that just little adjustments would be needed and figured maft could handle that. maybe i should invest in a safc though as well. what do you think.

[sbiggi]

hey by the way i have 550's, AFPR, MAFT, and the keydiver chip. Do you think i should invest in the SAFC for tuning as well as apposed to trying to use maft. i mean originally i figured that the chip would get my maps close enough that just little adjustments would be needed and figured maft could handle that. maybe i should invest in a safc though as well. what do you think.

you should be able to tune well enough with the maft, especially using the rpm mode

[91turbolaser]

alright thats good to hear. glad i dont need to spend another 300 on fuel parts. well my trims now all read 100% except for FTRL which reads around 110%. i think the ecu has had the time needed to get things situated and register soo i think these are what my trims really are at now. is that 110% lean enough to case any hesitation or stall on first cold start. i dont think it is, but im still in the newbie phase of tuning. thanks. matt