Hello, New to the forumns but having some CEL's on Q45

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b18ls_teg
Posts: 6
Joined: Wed Feb 24, 2010 2:00 pm
Car: 1996 Acura Integra LS-Turbo & 1994 Infiniti Q-45

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Hey guys I have a 1994 Pearl White Q45 with 210xxx miles. The car has had some issue as of late and my dad and I garaged it. Today he had mentioned that I could have the car if I fixed it sooooo I've started to research a bit and came up with these CEL's

12=Mass Air Flow Sensor- Did that today16= TCS Signal- Have no idea what this is?????34= Knock Sensor- Just ordered one and found a thread on here how to install it.46= Secondary Throttle Sensor- Have no idea once again????51= Injector Analysis- Have no idea once again

So basically 16,46 &51 I need some information on if anyone has info on this. This is will be a project from here till summer to get fixed since my other car an 96 Acura Integra LS-Turbo has (no AC) LOL.

But please any help will be awesome.

I'll post pics of the car later Thanks in advance to all


b18ls_teg
Posts: 6
Joined: Wed Feb 24, 2010 2:00 pm
Car: 1996 Acura Integra LS-Turbo & 1994 Infiniti Q-45

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Oh sorry I believe I posted in the wrong section.

maxnix
Posts: 22627
Joined: Mon Jul 22, 2002 8:11 pm
Car: 1995 Infiniti Q45
1995 Infiniti Q45t
2000 Infiniti Q45

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KS you want to replace in pairs, and all gaskets and hoses you encounter. A good looking hose can be rotten on the inside. Must replace KS harness also. Good time to also replace VC gaskets and spark plugs (per FSM!).

http://www.nicoclub.com/FSM/Q45/
Modified by maxnix at 5:50 AM 2/25/2010

Q45tech
Moderator
Posts: 14296
Joined: Tue Apr 30, 2002 3:19 am
Car: 1990 Q45 342,400 miles 22 years ownership with original engine
1995 G20t 5 speed 334,000 miles 16" 2002 wheels - 205/50/16 Sr20ve vvl

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The FSM devotes at least 1 page of dialog for each code and there are dozens of pages for general ecu discussion.

The first step is to understand that the CAS sends 180 pulses per exhaust cam revolution which translates to 360 pulses for the crankshaft. So the ecu knows where the engine is to the 1/360 of a revolution.

Even with nominal chain stretch the other bank is within 1-1.5 degrees worstcase.Accurate coil on plug ignition creates an extremely smooth and balanced power compared to old distributer type single coil system. This alone is worth 10 HP.


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