Name this part, please

SBNova

SBNova

New member
What is the little black sensor(?) net to the MAP sensor on the intake just to the drivers side of the plenum? It has a filter underneath a cap.

I ask because like many, I have a knock issue. Under acceleration from a roll I get about 4-8 degrees of retard, hundreds of knock counts but little or no audible knock. From a standing start, it will knock audibly and sometimes really bog the motor down (I didnt see the knock retard- I was watching the road and for some reason my tunerpro wont record) I dont want to repeat that again.

While scanning, I have a very good vacuum signal that fluctuates with the gas pedal, but my "turbo boost" doesnt read while scanning when set as 2-bar. When set as 3-bar it will read some boost but not much (again, difficult to see an exact number while driving) My factory gauge will read full boost while this is happening. I'm just wondering if Ive got a faulty sensor of the wrong MAP in there.

Thanks
 
SY756

SY756

New member
Re: Name this part, please

SBNova said:
What is the little black sensor(?) net to the MAP sensor on the intake just to the drivers side of the plenum? It has a filter underneath a cap.
Click to expand...

That's the EGR solenoid.

On the knock issue I would first check the timing and make sure you have the correct MAP for the chip you are running.
 
steve-o

steve-o

Member
Re: Name this part, please

Yep, what he said ^

To get a handle on your knock issues, start off by giving the truck a good tune-up, (Cap, rotor, correct plugs, wires, filters, vacuum hoses, etc.) and be absolutely certain you have at least 91 octane in the tank. Doing this can rule out many causes for knock. Start there first. If the EGR controller had issues I think it would throw a code.
 
SBNova

SBNova

New member
Re: Name this part, please

Yeah, I dont have any EGR codes, I was just wondering what that was. I had a code 33, and looked into the MAP and found crumbling vacuum lines. I replaced the ones from the MAP to the T on the back of the plenum- including the T- and the line to the regulator. It mustve had a vacuum leak because the idle is smoother and boost comes on much quicker now. My code 33 is gone too. My MAP says GM on it, how can I confirm its the right one? Is stock 2 or 3 bar for scanning purposes? Im guessing 2bar but that one wont read boost at all when scanning.

BTW- this truck is new to me but supposed to be all stock. I *believe* its got the stock map and stock chip.
 
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2kwik4u

Resident slow guy
Re: Name this part, please

Have you datalogged it with the new vacuum lines to the MAP sensor? Does it still show NO boost? Which value are you looking at (the EXACT name)? Also what definition file for tunerpro?
 
SBNova

SBNova

New member
Re: Name this part, please

I tried with the new hoses, same reading.

When I scan, There is a reading but its negative, like "-14.8" until the factory boost gauge registers boost pressure. I got the datastream file from NWSTP.com, and it says Tunerpro ALD def 2/3 bar. Its better than the one I had that comes with Tunerpro written by Mark Mansur. I will get the exact name of the value by tomorrow- Im at work until then.

I also decided to hot wire the IC pump, and when I last scanned my IAC reading was "0". Ive never checked it before, but Im sure this is a problem. I dont get any error codes now since Ive fixed the vac hose to the MAP.
 
SBNova

SBNova

New member
Re: Name this part, please

I dont have a log file..... funny you should ask. I have been posting all day over at thirdgen.org trying to figure out a problem.

I had Tunerpro 4.0, working reasonably well but it wouldnt log anything- I kept getting errors. So I decided to upgrade to version 4.13 but it wouldnt run- I kept getting a kernel32.DLL error. Then I uninstalled 4.0 thinking that maybe they couldnt co-exist. 4.13 still wont run. Then I tried to go back to 4.0 but guess what- I dont have it saved anywhere!!! I do have 3.09 saved so maybe tomorrow when I get home I can give it a try. What a day I had yesterday trying to figure this stuff out!

Does anyone have TunerPro RT 4.0 setup they can email me??

SBNova@yahoo.com
 
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2kwik4u

Resident slow guy
Re: Name this part, please

I'll check for a 4.0 install tonight, however I have a feeling all I have is the latest/greatest stuff.
 
Loeryder

Loeryder

New member
Re: Name this part, please

I think I just deleted my 4.0 install files last night.
Just upgraded to 4.1x, so it might still be in my recycle bin at home.

I'll check for ya tonight.
 
SBNova

SBNova

New member
Re: Name this part, please

Mangus said he couldnt believe ANY Tunerpro was running on my windows 95 system, but I know for sure that 4.13 will not. If anyone has anything older than 4.13 I would love to try it out.

Thanks to all !!
 
SYO237

SYO237

SyTy Registry
Re: Name this part, please

Hey Jim...

If by chance you can get the following items before I come over:

Dist. Cap/Rotor (brass tips)
Plug Wires - Taylor Spiro Pro, call Tucker Auto Parts in the vendors section, talk to Hood, tell him you live near me, he'll take care of you.
NGK UR6 plugs or AC Delco CR42TS plugs

This will be the start to getting your truck running back to normal.
 
SBNova

SBNova

New member
Re: Name this part, please

Ok the fields I was not reading boost in TunerPro are;

Turbo Boost 3 bar (PSI)
Turbo Boost 2 Bar (PSI)

The 2 bar wasnt moving from its negative figure, the three bar moved but never rear anywhere near where the factory gauge indicated, maybe half.

Adam- I will try to get some of that stuff. I found I have Bosch Platinum plugs right now, cant remember the # but it had a 9 so I think that they are hotter than the AC42's.
 
SYO237

SYO237

SyTy Registry
Re: Name this part, please

if those bosch are hotter than 42s, then right there is a culprit for knock.

If you dont get plugs by the time we meet up, I think I have an extra set of 42s and UR6s, so I will bring them with me. :tup:
 
2

2kwik4u

Resident slow guy
Re: Name this part, please

Yea, get your plugs straightened out, and that will be a good step in the right direction.

I downloaded, and setup tunerpro like a fresh install last night, and all of the formulas look good from the NWSTP site when compared to the known working configuration I had. Not sure where to point you on that one.

However it sounds like you've got some help coming.
 
SBNova

SBNova

New member
Re: Name this part, please

Thanks for the help guys. I just got home and found someone emailed me a copy of 4.0 so I think I'm up and running again. My truck is running pretty good overall, I just dont want it to knock and fall on its face if I get on it from a standing start. I usually get on it from a good roll and it does just fine (no scanner attached, just sounds OK) I think its time to break out the wide band and check that too.

I guess the UR5 is hotter than a UR6? All I can find in stock are UR5's.
 
SBNova

SBNova

New member
Re: Name this part, please

New Info-

Now that I have TunerPro running again, I checked the IAT reading and in the field that reads F I still have "0", all the time. If I choose celsius it reads 41-44 and actually increases with temp. I will have to convert it to F to see if its accurate or not. If it is, then I guess I have a Tunerpro issue.

As for the knock, those UR6's arent easy to score. I did run the WB on the Ty today and found nearly 10/11 at WOT initially, quickly fading to 13.xx as the RPMs increase. I need a fuel pressure gauge I guess, but I bought a new fuel filter to try as well. The old one looks clean on the outside but I have no way to tell how old it is.

After changing vacuum lines I eliminated my code 33 (MAP). The problem is that it came back. Since Tunerpro wont read boost in the Turbo Boost PSI fields correctly (the stock gauge works, and the truck repsonds to the boost measured on the stock gauge) I am starting to think maybe the MAP sensor is having issues. I found a web page that shows how to tell what MAP you have and mine is a 2bar that seems age appropriate for my truck (marked GM too) so I guess it could be bad. My local parts store has a Typhoon replacement for $33 in stock, I just want to be sure before I waste the money on a non-returnable item.

I guess my MAP/boost sensing issues could be causing my lean at WOT problem- and also causing my knock problem. I just need to sort it out some more. I wish I could borrow a 2-bar to test mine. My A/F ratio is exactly 14.7 with very little fluctuation at idle, and cruise is nearly the same at 40 -50 mph. Dont these 7749's have any lean cruise mode?
 
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