I had this shop tune my car, overall it was good. But they said id need some new plugs (bkr7e's) So they through them in, then today, i pulled them & checked their gap. cyl #1-#2 were .32, cyl #3 was .29, & cyl #4 was .35

The car sometimes cut-out @ 6200 rpms & was jerky under normal driving.

Anyone think i found the answer???

 

sounds like u described EVERYTHING an UN-tuned car does.Get ur money back now, dont wait.

 

its been since May, im not going back there. but i was pretty pissed when i found out what they didnt do.

 

so its been 4-5months since it was tuned?

If so, u should have changed the plugs by now and they probably moved gap from being in there so long.

New ones should clear it up and its not the shops fault nesscarlily.

 

i have only gone about 1200 miles all summer. i need to change plugs sooner now?

never heard of spark plugs having their gap change, esspecially in less than 1500 miles!

 

well me either, but i wouldnt automaticly assume the shop didnt gap them.I assume up until now the car ran good?

 

for the most part. sometimes it cuts out at high rpms, when im driving normally, at 35-40mph, it chugs like im stepping on the gas & letting off constantly.

I just thought that for being a complete standalone unit, it isnt too bad.

 

i forgot. when shuting off & starting up the car more than 3 times, it just cranks, then i fire-up my laptop & send a new calibration to the AEM box, then it starts right up. I plan on sending the box into AEM to have them fix any issues with the box.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1baddturbosi &raquo;</TD></TR><TR><TD CLASS="quote">for the most part. sometimes it cuts out at high rpms, when im driving normally, at 35-40mph, it chugs like im stepping on the gas & letting off constantly.

I just thought that for being a complete standalone unit, it isnt too bad.</TD></TR></TABLE>

sounds like a lean spot. did they tune part throttle or only WOT?

put some new plugs in the car. 7's shouldnt foul out that easily. 9's and 10's foul out quick, i had ot change my plugs every 3 months when i was run n NGK 10's.

 

i know it made 276whp, so obviously at WOT, but i dunno about partial throttle!!!!

I got new ngk plugs & gapped them to .30

 

thats gaps arent crazy out of spec anyways. and they come with much larger gap than that so someone changed the gap before installing. i think there are problems with the tune.

 

so.... u think since the plugs were prob messed-up when they tuned it, that i should install new plugs & have it re-tuned????

 

could be the tune but sounds more like the gap to me. Re gap the new plugs and try them and if thats not it then its the prolly tune.

 

ill try & put my new ngk plugs in (gapped to .30) & see how it runs!!!

Thanx for the help

 

well a new set and regapping is obviously the easiest and cheapest place to start. i dont think ht car should feel "jerky" from the plugs though. unless they are fouled or something. i change my bkr7e's every other oil change or so.


Modified by dpetro1 at 10:33 PM 10/31/2007

 

i threw new plugs (gapped to .30) in her today & it started and drove great, but it doesnt seem to have that "hard" pull that it normally does. Sooooo im thinking im gonna have get her re-tuned this coming spring

 

thats good but if your not getting it re tuned till spring be careful driving her if you think the tunes not good.

 

its not badd. at full-throttle my afr is from 12-12.5, but i think overall its ok!!!!

 

ok. today i was out driving & i noticed that my AFR with full boost on WOT was 10.0-11.2, then the car would cut-out like crazy.

Am i running way too lean??? after it cut-out a few times i just took it back to my storage garage & parked it!!!!

 

10 and 11 is rich and should still run fine. i have my plugs gapped at .19 try something smaller than .30

 

u think thats it? sorry i got the lean/rich mixed up. i think i might just might wait until i can get it TUNED in the spring.

could it be cutting-out from too much fuel???

 

thats unlikely. sounds like your blowing out spark. witch means you need a smaller gap.

 

.30 gap is more then enough for his HP if you want you can upgrade your Coil to an external one that will help but you do not need to gap it any less then that.

Mine is set at .32 with the same HP level.

 

today, i set the gap from .32, to .28, .26, & .34 & it still cut-out & ran like pooh.

Any suggestion??? set the gap & re-tuned????

 

your plugs are not the reason its running like that.

were talking about a couple thousandth's of an inch here. you gaps should be at .030, not .30