HI,
I've bought MSD-2313 3bar Map Sensor for 1996 Lingenfelter Supercharged C4 But, it has a problem. I can't start the engine, just hearing engine sound once and off.

So, could you guys give me a favour for finding a right map sensor?

The car is 1996y Lingenfelter Superchargered Corvette.

Thanks

 

Did Lingenfelter do the SC install? If so did you try to call them and see what they would recommend for the sensor?

 

I'm not sure. Someone imported the car from USA.
I'm in ovesea and called Lingenfelter shop and got replied "same as C4 corvette map sensor". That's why I bougt the 3-bar map sensor.
plz help~*

 

You got a 96 come with 1 bar map for NA motor. You can not just install the 3 bar map and expecting it to work. In order for you to use the 2 bar map you will need to rewrite the the pcm for 2 bar map. No one yet able to write a program for 3 bar map that I know of. I am running a 2 bar map on my 93LT1 turbocharged 383ci another forum menber here. Most of the forced induction guys here are running a 1 bar map. Your car is probably running a 1 bar map from LPE.

Bruce

 

But, The car is supercharged. It has more than 0 psi.
I've tried with GM stock C4 1 bar map sensor before using 3 bar sensor. When I see the boost gauge over 0 psi, the engine is off with 1 bar map sensor.

someone took the stock map sensor so, I don't know about the stock map sensor at all.

If the car is just C4 corvette, it is easy to find out the stock map sensor, but the car is fully modified by lingenfelter.

The owner said that he called to Lingenfelter before I called them, but they said "just bring the car over USA to fix it" I also sent e-mail to them, but Never replied.
I dont know much about C4, but the owner said "the car is 7,400cc with supercharger"
I swa inside of the bonnet, I could see the mark of "Lingenfelter" on engine and the hugh supercharger.

Plz help me more!

 

well, it isn't 7400 CC, that is 454ci, and the LT1 block won't go that far.

So the engine IS supercharged? Well, you need to converse with LPE and let them know you are in Korea, and that you need remote support. If they can direct you to a garage or shop... It will cost about $5000, at least, to ship the car back home to Indiana to get it fixed...

If they can forward you a tune, then you can enter it via LT1 Edit... that might help a lot. I am SURE they have a premade tune that will make this work.

And if they say the tune is "ours and ours alone" tell them, that thanks to LT1 Edit, i can pull and read your tune at anytime. Just tell them you need a baseline tune to make this combination of parts work.

 

You have a 1 bar map on your car period. The 1 bar map has nothing to do with your boost gauge. When you start the motor the boost guage will read vaccum and when you go wide open throttle the you will see the gauge read boost. What ever you are trying to do. I doublt it nothing nothing do with your boost gauge and the map sensor.

First of all. tell us more about the setup. It a vortech supercharged? or Procharged? If you are running a 6 ribs belt setup. You will see no more than 6psi before the belt slip any way. You say it modify. Modifed mean so many different thing to people. What do you have? 355ci, 383ci? 396? or just a 350ci with a the supercharger. Many people are running relatively modest amount of boost and they are not running a 2 bar map and they works fine.

 

Thanks.

Nobody knows about Lingenfelter in Korea.
The car is very famous in Korea. We have underdrag racing club that is the biggest club in Korea. Everyone think the car is 7,400cc. I felt fully shame.

 

I will take the engine photo with the information tomorrow and let you know. Thanks Bruce & Bogus!

Now, I just know the VIN number: 1G1YY2257T5110642

 

no, no need to feel shame! It's an honest mistake. You know only what you have been told... don't feel bad!!!! That's the best part of this site, learning!

If you would like, I will contact LPE and ask them on your behalf. Perhaps I can communicate this more clearly to them.

 

you have a 1 bar map. Unless you are running an aftermarket ecm.

Like bruce said, you can't just add a 2 or 3 bar map to your stock ECM and expect it to read boost.
What all is done to the car? you might want to post in the C4 FI section, there is a lot of knowledge there on FI.

 

<img src ="http://www.underdrag.co.kr/a/body1.jpg">

 

You guys so kind!
I got the e-mail form LPE.
-----------------------------------------------
It should take the factory replacement MAP sensor.

Tim Dyer
Sales Manager
Lingenfelter Performance Engineering, Inc.
260 724 2552 x 1001
http://www.lingenfelter.com
ICQ# 223991829
------------------------------------------------

But, I dont know the factory map sensor P/N.
Anyone knows? Where can I buy it?

I got some photos today.

Body






Interior


ECU

 

Engine (with MSD-2313 3bar Map Sensor )



Vortech Supercharger (Serial Number: 22007)


Map Senor (GM 1bar Map sensor)



Thank you!!!

 

I have wrong information. Sorry guys!
With 3 bar mapsensor, engine never start. just hearing engine sound once and off. I can see the voltage 1.27v and 5.3v
With 1 bar mapsensor, I can start engine. Sounds very good! But, when I push full acceleraing over 3,000rpm the voltage is zero and engine off.

Bogus! If you can contact LPE for this matter, I will be very very happy.

Thanks!

 

The PCM lable looks like it was tuned by Z Industries in souther Cal. He uses lables like that. It also appears that it is a stock engine with stock compression.....going by the lable I see 10:2 not sure if that is true or not. In any case, I don't think LPE would use Z industries to tune their cars, I know back in the mid 90s they used Jimmy Formatto at the time.

As for your MAP sensor, normally the engine relies on the MAF sensor for its fuel requirements. The MAP sensor is used as back up if the MAF fails so that the PCM can run in what is referred to as speed density mode which requires a manifold pressure input from the MAP. When you accelerate to 3000 RPM is the engine under load or just in nuetral gear? If its under load and you see 0 vacuum or if the boost gauge goes positive, you should see greater than 4 volts. At high vacuum voltage goes low.

Also have you checked for the possibility of ignition problems? The other thing to check is to remove a couple of the spark plugs to see if they are fouled. If they are fouled your engine could be flooded by the MAP sensor being played around with.

Danny do you have a scan tool? If you do are there any diagnostic codes that have been set? That would help diagnois your car, otherwise can you send me a airline ticket I wouldn't mind checking out Korea Just kidding of course, I have been to your country, beautiful place you have there!

 

TO be very honest with you. I don't think you have a true LPE car.

THe motor could be LPE built but the rest certainly is not.

The sticker on the computer tell me a lot. 3.73 gears, 800rpm idle, 6300cc(383CID), 10.2:1 CR, 26LB injectors, 80% duty cycle?, 112LSA, Headers, and PRo charger supercharger 7 psi.

By the way, You do have a stock computer so you cannot run a 3 bar map.

I don't think this is a combo LPE would put together for their supercharged C4s. but the 383 motor itself could very well be LPE, don't know unless you check the internals???

The procharger you have is a D-1 head unit, which is a very good blower, it is not a vortech but it would be equalivant to a Vortech T trim.

 

Korea is suck~ the gas is so expensive. More than 8 times price than USA. Nobody says It's gas station... We say Tax station(60% tax!!!).
I've been to NJ. much better up there!

I accelerated to 3000rpm under nuetral gear.
There is no scan tool for the car.
If this car is not by LPE, what is the LPE mark on the engine?
Z industries might build the car with LPE engine!!!??
It's so complicated.

First at all, I think I have to find the right map sensor and see how's going on.
I've tried with 3 types of GM 1 bar map sensor, and 1types of MSD 3 bar map sensor. The 3 types of GM 1 bar map sensor has same problem.
Anyone knows which map sensor use for the car?

 

Just a thought but have you checked your fuel delivery?Sort of sounds like it is starving from what you say.Mabey fuel pump?If you can get a factory service manual it might help a little with the sensors.

 

I run a two-bar MAP sensor that is read by my FAST ECU. 3000 rpm should be about the begining of your boost curve under WOT so I could see why your MAP sensor is quickly running out of range, though I don't see why that would cause a shutdown.
BTW, I am currently back on my P-1SC running 12 lbs. on a 6 rib. It's definently slipping, but I can still see 12 psi of boost both on the MAP and the boost gauge