Problem: 04 eco cavalier w/GM s/c...its bogging! - Boost Forum

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Problem: 04 eco cavalier w/GM s/c...its bogging!
Friday, July 14, 2006 11:11 PM
First, let me say, i DID SEARCH multiple times for a topic like this and nothing helpful came up.

Ok, so heres the scenario: my friend has an 2004 ecotec cavalier. he recently bought the entire GM supercharger kit from the site i forgot but have seen mentioned here before. the kit was 2800$ shipped and came with everything to bolt it on.

we spent a day installing the s/c. made sure we followed the directions on the cd exactly.

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heres the problem:
at idle, the car runs fine.....just like stock....rpm and everything is fine. then when you floor it into hight RPM (above 4k) it LOVES the boost and the sc whines so nice.

ok but when i first give it gas the car bogs and almost dies. i have to launch at like 3k to keep the engine alive. if i barely touch the gas the car shakes and dies.
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ok: so we checked all the vacuum lines and i believe they are all correct.
we changed the spark plugs.
it has no exhaust or header.....could this be causing the bogging and dying?
i dont hear any combustion or bad noises.....it sounds like a healthy engine, it just dies when given gas
when i stand by the muffler it kind of sounds like it is misfiring. could 1 of the injectors the kit came with been bad?
there isnt a check engine light either....it has come on before, but rarely...whatever it is, its not throwing a CEL.
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thanks for anyone who helps. my friend has had to leave his car at my house now in california while he goes back to texas tomorrow because he is deploying to iraq for a year. i was hoping to get it running before he left but i dont think thats going to happen.





- Cameron (CaliforniaCavalier)
- www.csc-motorsports.com (my new NOR-CAL car club site!)




Re: Problem: 04 eco cavalier w/GM s/c...its boggin
Friday, July 14, 2006 11:14 PM
Did you get the reflash?





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Re: Problem: 04 eco cavalier w/GM s/c...its boggin
Friday, July 14, 2006 11:18 PM
what reflash? i wasnt aware i needed a reflash for the kit.....i know it says its recommended but ive had people tell me its not needed to run correctly.

and are you talking about the ECU relfash or PCM? how much will that cost me?



- Cameron (CaliforniaCavalier)
- www.csc-motorsports.com (my new NOR-CAL car club site!)



Re: Problem: 04 eco cavalier w/GM s/c...its boggin
Friday, July 14, 2006 11:23 PM
Yes, ECU reflash. If you hooked the new MAP sensor into it, it needs the reflash. Put the old map sensor on once and I bet it won't bog (but it also won't be tuned right). Normally runs between $40 and $60 at a dealership.





4cyltuner.com - Information Source For 4 Cylinder Tuners
Buy stuff from CarCustoms Ebay! Won't be disappointed!

Re: Problem: 04 eco cavalier w/GM s/c...its boggin
Friday, July 14, 2006 11:24 PM
Wow you did not get the reflash?!

When they say "recommended" they mean do it so your car wont go boom!





Re: Problem: 04 eco cavalier w/GM s/c...its boggin
Friday, July 14, 2006 11:35 PM
does it matter that the IAT sensor in the intake tube isnt plugged in? the kit comes with the connector to bypass it but we didnt plug it into the new harness cause the car wont start......and its also not plugged into the intake pipe....its just hanging in the engine bay.

would that matter?



- Cameron (CaliforniaCavalier)
- www.csc-motorsports.com (my new NOR-CAL car club site!)



Re: Problem: 04 eco cavalier w/GM s/c...its boggin
Friday, July 14, 2006 11:37 PM
and also: is the map sensor the one that comes with the kit where you have to put the new end on it? its not either of the 2 sensors on the TB right?

and in the TB spacer the kit comes with should i plug the hole that is for automatic trannys? it says to plug it if the car is a manual (which it is), but it seems to run better unplugged.




- Cameron (CaliforniaCavalier)
- www.csc-motorsports.com (my new NOR-CAL car club site!)



Re: Problem: 04 eco cavalier w/GM s/c...its boggin
Friday, July 14, 2006 11:40 PM
The IAT really doesn't matter. Yes the map sensor is the one with the new end on it.





4cyltuner.com - Information Source For 4 Cylinder Tuners
Buy stuff from CarCustoms Ebay! Won't be disappointed!

Re: Problem: 04 eco cavalier w/GM s/c...its boggin
Friday, July 14, 2006 11:44 PM
the TMAP in the kit on the 03-05 seams to not run well with out the reflash

the 02's seam to be ok with it connected

you need the reflash for everything to work properly

the new iat is part of the new tmap , so nothing needs to be plugged into the intake


the TMAP is in the intake right infornt of the injector , and yes its the 1 you modified the harness for








Re: Problem: 04 eco cavalier w/GM s/c...its boggin
Friday, July 14, 2006 11:55 PM
ok so i just went out and unplugged the MAP. it runs better, and has smooth acceleration. but is it safe to drive temporarily with the MAP unplugged? what does the MAP do exactly anyways?

and the sc doesnt whine as much with the MAP unplugged....is that normal?



- Cameron (CaliforniaCavalier)
- www.csc-motorsports.com (my new NOR-CAL car club site!)



Re: Problem: 04 eco cavalier w/GM s/c...its boggin
Friday, July 14, 2006 11:56 PM
I would NOT drive around with the MAP unplugged. It tells the ECU how much air is going into the engine. Very bad to have it disconnected.





4cyltuner.com - Information Source For 4 Cylinder Tuners
Buy stuff from CarCustoms Ebay! Won't be disappointed!


Re: Problem: 04 eco cavalier w/GM s/c...its boggin
Friday, July 14, 2006 11:59 PM
.... Wow.

I had to read this twice to make sure it wasn't one of Dave's April Fool's jokes.

....but... Wow. Put the tools down and back away from the boost, man. And pick up the instruction manual and read it front to back 20 times before you touch the tools again.

**PUT THE 1 BAR MAP SENSOR BACK IN**

-Chris-




Edited 1 time(s). Last edited Saturday, July 15, 2006 12:00 AM

-Sweetness-
-Turbocharged-
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Re: Problem: 04 eco cavalier w/GM s/c...its boggin
Saturday, July 15, 2006 12:06 AM
so i call the chevy dealer and tell them that i need the ECU reflashed because i installed a sc?



- Cameron (CaliforniaCavalier)
- www.csc-motorsports.com (my new NOR-CAL car club site!)



Re: Problem: 04 eco cavalier w/GM s/c...its boggin
Saturday, July 15, 2006 12:38 AM
CaliforniaCavalier wrote:so i call the chevy dealer and tell them that i need the ECU reflashed because i installed a sc?


Yes.


H.O.N.D.A = Hold On Not Done Accelerating
Re: Problem: 04 eco cavalier w/GM s/c...its boggin
Saturday, July 15, 2006 12:56 AM
yeah seriously. didn't you get the instructions with the charger. it says the car should not even be started until the PCM is reflashed by the dealer. i towed my car in



Re: Problem: 04 eco cavalier w/GM s/c...its boggin
Saturday, July 15, 2006 1:25 AM
is there anything else i need to know when i talk to the dealership?




- Cameron (CaliforniaCavalier)
- www.csc-motorsports.com (my new NOR-CAL car club site!)



Re: Problem: 04 eco cavalier w/GM s/c...its boggin
Saturday, July 15, 2006 11:33 AM
im the install instructions it tells you to leave the MAP unpluged , then to get it to the dealer for the reflash

with out the map connected it runs on a map that keeps it on the rich side , as well as the larger injectors

i wouldnt be running it hard with out the reflash , id go straight to the dealer and get the reflash done , to much playing around with out the reflash , youll destroy the cat converter from all the extra fuel


print out a copy of the instructions , and go to the dealer and get the reflash , and make sure you can get to the plug for the map , so they can plug it backin










Re: Problem: 04 eco cavalier w/GM s/c...its boggin
Monday, July 17, 2006 1:11 PM
does that supercharger kit also work on the automatics? because i know hahn racecraft's turbo kits dont work for automatics... i still havent gotten a straight answer out of them on why it wont work. so i figure id ask here.
Re: Problem: 04 eco cavalier w/GM s/c...its boggin
Monday, July 17, 2006 1:19 PM
yes the eco s/c will work with automatics

phlatcav , has a auto trans in his cav with it







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