Missing in action"

[shosupercharged95]

New to Forum, I have a 1995 MTX Supercharged, just
did a 60K actual miles (83K) before I did the tuneup, I was getting an intermittent no spark on number 2 cyl, would come and go, so I did the 60 k, Cam Sensor,Crank Sensor, Pump,Timeing belt, etc. fired up the car ran like a champ. After a while then again the missing comes back. After 3-4 miles go's away. I have a spare coil pack swap out all clears after driving around check lite comes on missing again the usual no spark on a cylinder. Any ideas, plugs are new, changed wires out same thing occurs after a hour or less. Any ideas.

 

[Mr Anonymous]

Try starting with the codes. That check engine light is trying to tell you something. There are links in my signature to sites with instructions on how to read them yourself with something as simple as a short piece of wire or even a paperclip.

BTW, whose S/C setup are you running, and how much boost?

Welcome to the forum!

 

[shosupercharged95]

Do not really know exactly who did the Mod, I got the car from a freind who was Stationed in California, I think I saw something that read Huntington Beach Calif. It is Belt driven nicely done as far as boost is concerned never had a gage installed. It is a Vortec V-1. when she hits 4 k she takes off like a rocket. I will check about engine lite.

 

[shosupercharged95]

Did the test, Code # 551 IAS, what is this beast

 

[shosupercharged95]

Ok did a test with a Snapon Scanner here are the codes. Engine Off = 511 ECA MEMORY,
565 Cannister Purge Can
217 Coil primary Cirquit

Engine Running 172 EGO not switching
136 No EGO
Ok how about translation to simple english any takes?

 

[Chris Benvie]

I am not a code reader but if you look in Mr. Anonymous's sig. you will be able to figure out what they are. I wish i could help you more, but it is noon time and people just aren't on the forum. Please check around 4:00 or so when people are on.


Welcome to the SHOforum Forced Induction club! thumb

 

[AutoSHO]

Sounds like you need to replace the oxygen sensors based on the 136 and 172 codes.

The 217 is a failure of ignition coil #3. This means that either the DIS ground is bad our the wiring running from the DIS to the coil pack is bad. Check all the connections and make sure they are clean and free of corrosion.

 

[Chris Benvie]

I shoulda known chris was here and on top of things. You would think we have nothing better to do.

 

[masho95]

shosupercharged95:
Ok did a test with a Snapon Scanner here are the codes. Engine Off = 511 ECA MEMORY,
565 Cannister Purge Can
217 Coil primary Cirquit

Engine Running 172 EGO not switching
136 No EGO
Ok how about translation to simple english any takes?

Actually right now I don't have anything better to do than be on here. The 565 is a failure of the canister purge solenoid. It's on the driver side front of the car. It's a cylindrical tube with an electrical connector at the top at a T fitting and 2 small hoses connected to it. You should be able to order a replacement solenoid for about $35 from Autozone or the like. IIRC if you are getting codes for BOTH O2's then they are likely ok, and something else is making them trigger. Both the O2's codes are showing that your engine is running on the lean side. You are going to have to investigate further on what's causing that.

 

[morpho18]

hmm...supercharged motor, no boost gauge, running lean...

is it running too much boost on stock injectors?

 

[Chris Benvie]

morpho18:
hmm...supercharged motor, no boost gauge, running lean...

is it running too much boost on stock injectors?

god help anyone that didn't install larger injectors on a boosted SHO

 

[shosupercharged95]

OK I will check it out, however what is the DIS, are we talking ICM ? PCM ? Im ignoranrt.

Frank

 

[91 Plus]

do you have pics shrug

 

[SHOkid13]

The DIS is the ignition coil unit. Check the grounds and make sure everything is tight.

 

[masho95]

SHOkid13:
The DIS is the ignition coil unit. Check the grounds and make sure everything is tight.

The DIS is mounted of the passenger side of the intake. Grey rectangular object which should say DIS on it and has connectors on both sides.

 

[shosupercharged95]

New scenario started car continues to miss. Shut Car down pull # 3 wire off coil start the car arc jumping off to my intake tube fwd of coil pack. Reconnect # three wire while running miss clears up hitting on all 6 again. Wheres the gremlin? Bad wires ?

 

[shosupercharged95]

OK heres the latest, changed the coil pack out drove around stop and go highway etc. all system remained normal performance great. Though this a used pack. I will buy a new one tomorrow. Don't want to fool with used and old electronics. Thanks for the imput everyone. Also I have an MPEG of the engine running, how do I attach laugh_ti to this forum.

 

[masho95]

shosupercharged95:
Also I have an MPEG of the engine running, how do I attach laugh_ti to this forum.

Sweet we'd love to see it. Although you can't attach files here. You need to put them on a web site and put up a link. How big is the file? I might be able to help you out if it's not too big.

 

[shosupercharged95]

Size of MPEG 1343 KB WHERE CAN I POST

 

[masho95]

shosupercharged95:
Size of MPEG 1343 KB WHERE CAN I POST

Email it to me at [email protected] and I'll put it up on my web site, and then I'll post a link to the file on here.