Microtech No secondary injectors!!! Runs great then secondaries don't kick in!
#1
Senior Member
Thread Starter
Join Date: Aug 2006
Location: SoCal
Posts: 430
Likes: 0
Received 0 Likes
on
0 Posts
No secondary injectors!!! Runs great then secondaries don't kick in!
Hey guys, Started tuning my LT8S. Well... "started" We busted *** finishing up my car, stayed up late all week, couple all nighters, like yesterday. Finally got the car started and then on the dyno at 7:00 am. At 4:00 pm we gave up. That's a long *** time to sort out all different possibilities.
Changed CAS, some wires were grounding out on my first one. Ran better, but problem still occurred.
I have a fucked up intake air temp sensor. (possible problem?)
I have a (we think) fucked TPS. At 30% throttle, it will start reading 100% voltage. WTF.
Despite those issues, we figured we could muscle past it and at least lay down a couple solid runs with boost.
I am running stock 550 primaries and RC Engineering 1000cc secondaries, T04S, HKS mani, HKS GT 'gate, TiAL BOV, Greddy compression tube, V-mount setup, and that's all the important stuff.
From the moment we cranked it and got it to start (resolved some mixed up wiring issues) it ran awesome. AWESOME. I mean, 12:1 then going to 10.5:1 AFR, and as soon as it really started to get into boost around 4k and we had the secondaries come in, BOOM spike up to 16:1, even more, then we obviously would let off as soon as that would happen.
WTF!!!
Checked a billion times to make sure the secondaries were opening, and operating. Yes. All good.
We put back 550cc secondaries.
Same thing.
Then I said **** it, lets try 1000cc primaries. After massaging a map to allow those suckers an idle, we got them dialed in, boost, nice, then about 4K again BOOM lean as ****! WTF! With 1000cc PRIMARIES!!!!!!!!!!!
Ok, we've been up for a couple days so maybe we're missing something super obvious, but right now my experience with the Microtech is driving me goddamn insane!!! We even had the previous tuning guru help out. Darren (now the landlord) from RnD Dyno. He spent a good 2 hours volunteering to help me out. STILL, even stumped him, and he's tuned LT8S 13BTs all day before!
I will bet its due to lack of sleep, but has this happened to anyone else before? Are we underestimating the importance of a proper good TPS and IAT? Like I said up till decent boost at 4k, the bitch runs PERFECTLY, really amazing, lots of flames (not even from being obscenely rich) and an amazing sound. So sad, I wanna take her to 8k!!!!!
Thanks anyone who can help!!
-Lindsay
Changed CAS, some wires were grounding out on my first one. Ran better, but problem still occurred.
I have a fucked up intake air temp sensor. (possible problem?)
I have a (we think) fucked TPS. At 30% throttle, it will start reading 100% voltage. WTF.
Despite those issues, we figured we could muscle past it and at least lay down a couple solid runs with boost.
I am running stock 550 primaries and RC Engineering 1000cc secondaries, T04S, HKS mani, HKS GT 'gate, TiAL BOV, Greddy compression tube, V-mount setup, and that's all the important stuff.
From the moment we cranked it and got it to start (resolved some mixed up wiring issues) it ran awesome. AWESOME. I mean, 12:1 then going to 10.5:1 AFR, and as soon as it really started to get into boost around 4k and we had the secondaries come in, BOOM spike up to 16:1, even more, then we obviously would let off as soon as that would happen.
WTF!!!
Checked a billion times to make sure the secondaries were opening, and operating. Yes. All good.
We put back 550cc secondaries.
Same thing.
Then I said **** it, lets try 1000cc primaries. After massaging a map to allow those suckers an idle, we got them dialed in, boost, nice, then about 4K again BOOM lean as ****! WTF! With 1000cc PRIMARIES!!!!!!!!!!!
Ok, we've been up for a couple days so maybe we're missing something super obvious, but right now my experience with the Microtech is driving me goddamn insane!!! We even had the previous tuning guru help out. Darren (now the landlord) from RnD Dyno. He spent a good 2 hours volunteering to help me out. STILL, even stumped him, and he's tuned LT8S 13BTs all day before!
I will bet its due to lack of sleep, but has this happened to anyone else before? Are we underestimating the importance of a proper good TPS and IAT? Like I said up till decent boost at 4k, the bitch runs PERFECTLY, really amazing, lots of flames (not even from being obscenely rich) and an amazing sound. So sad, I wanna take her to 8k!!!!!
Thanks anyone who can help!!
-Lindsay
#4
Senior Member
Thread Starter
Join Date: Aug 2006
Location: SoCal
Posts: 430
Likes: 0
Received 0 Likes
on
0 Posts
I am going to switch to a Haltech. Kinda mutual decision between me and the shop, cause they are much more comfortable and able with the Haltech.
#5
sorry to thread steal but i am having the same issues. and i was wondering what do you mean when you say you wired up the short range tps???
#7
Rotary Enthusiast
Join Date: Feb 2005
Location: Norway
Posts: 846
Likes: 0
Received 0 Likes
on
0 Posts
Dont know if this helps but i had the same problem..
My 1680 was opening to much at 3000.. it felt like hitting a wall.. The problem was a map made for alot smaller injectors than 1680cc.. Newb map problems, i know... Just an ide..
My 1680 was opening to much at 3000.. it felt like hitting a wall.. The problem was a map made for alot smaller injectors than 1680cc.. Newb map problems, i know... Just an ide..
Trending Topics
#8
Junior Member
Join Date: Mar 2007
Location: New Zealand
Posts: 43
Likes: 0
Received 0 Likes
on
0 Posts
This sounds very familiar to what i experienced on the dyno a few weeks ago....
Initially the car went fine did a few good pulls, got some good numbers, after a while i started experiencing what ur describing... car started hitting a wall when coming on boost, like when the secondaries are (or not) coming on...it was really weird... did a comp test whilt on the dyno 110psi on all faces on both rotors...
Tuned the car the best we could with it behaving as described, took it off the dyno and took it for a road test...Well the car went like a bullet, no problems pulling like a train, even when the motor was loaded up heaps boosting up a hill in 4th...was very weird....
After some discussion, we put it down to two things
1. badly sealing motor, possilbly due to worn out side seals and springs(Unlikely with those comp numbers and the age of the motor, 10,000kms) or
2. Dyno loading issues, dyno loading up the motor too much?... could be ur problem aswell.. just a thought...
Motor is a 13BT Full-Bridgeport, Microtech LT10S, 1000/1600cc injector combo Masterpower T70, Bosch 044 fuel Pump and all the requried extras.
Initially the car went fine did a few good pulls, got some good numbers, after a while i started experiencing what ur describing... car started hitting a wall when coming on boost, like when the secondaries are (or not) coming on...it was really weird... did a comp test whilt on the dyno 110psi on all faces on both rotors...
Tuned the car the best we could with it behaving as described, took it off the dyno and took it for a road test...Well the car went like a bullet, no problems pulling like a train, even when the motor was loaded up heaps boosting up a hill in 4th...was very weird....
After some discussion, we put it down to two things
1. badly sealing motor, possilbly due to worn out side seals and springs(Unlikely with those comp numbers and the age of the motor, 10,000kms) or
2. Dyno loading issues, dyno loading up the motor too much?... could be ur problem aswell.. just a thought...
Motor is a 13BT Full-Bridgeport, Microtech LT10S, 1000/1600cc injector combo Masterpower T70, Bosch 044 fuel Pump and all the requried extras.
Thread
Thread Starter
Forum
Replies
Last Post
trickster
2nd Generation Specific (1986-1992)
25
07-01-23 04:40 PM