MERGED-(Fresh opti pull pics) & (Ignition stutter-Code crackers needed)
Safety Car
Joined: Oct 2007
Posts: 3,816
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From: :45 minutes from everywhere / E-I-E-I-O
Loosening the PS pump was the right call.
Someone suggested loosening the A/C for extra room. I need extra room - I got a little mobility gig workin' against me sometimes.
The top opti wire was a bear. Finally clicked. One more (3rd), and we can zip - sort of the driver's side. Still got the #8 plug boot pass side
Notice the difference in clearance - first pic PS pump tight (and how 'bout that big ol hairy-*** tarantula waitin' for a snack
He got evicted - didn't pay the rent)), and pic 2 - PS pump moved forward about 5/8" forward.
Someone suggested loosening the A/C for extra room. I need extra room - I got a little mobility gig workin' against me sometimes.
The top opti wire was a bear. Finally clicked. One more (3rd), and we can zip - sort of the driver's side. Still got the #8 plug boot pass side
Notice the difference in clearance - first pic PS pump tight (and how 'bout that big ol hairy-*** tarantula waitin' for a snack
He got evicted - didn't pay the rent)), and pic 2 - PS pump moved forward about 5/8" forward.
Melting Slicks
Joined: Oct 2004
Posts: 2,510
Likes: 4
From: Austin Texas
(j/k dude, I am enjoying the ride(I liked your "hang-man" rig to hold up the AC compressor). Also glad you stuck with the thumbnail images, otherwise you would have brought Al Gores World Wide Web to its knees)
Le Mans Master
Joined: Dec 2004
Posts: 5,789
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From: Myrtle Beach SC
St. Jude Donor '05-'06
Really that looks to be the loom under the AC compressor and take the 2 bolts off and it comes right out.
Safety Car
Joined: Oct 2007
Posts: 3,816
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From: :45 minutes from everywhere / E-I-E-I-O
Saga continues H41 ICC open
The last #8 boot will not seat on the plug. I got on square, plenty of dielectric grease, pulled #6 boot and it wouldn't go on #8.
So my trusty little mirror showed this:
no major obstruction, but lots of fouled oil.
The old plugs are comin' out, and the new ones are goin' in. If you can't see to make sure no debris will fall in as the old plug comes out, GET SOME HOSE AND BLOW IN AROUND THE PLUG AS SOON AS ITS LOOSE - NOT OUT.
Does it ever end?
So my trusty little mirror showed this:
no major obstruction, but lots of fouled oil.
The old plugs are comin' out, and the new ones are goin' in. If you can't see to make sure no debris will fall in as the old plug comes out, GET SOME HOSE AND BLOW IN AROUND THE PLUG AS SOON AS ITS LOOSE - NOT OUT.
Does it ever end?
Last edited by schrade; Jul 10, 2008 at 11:23 AM.
Safety Car
Joined: Oct 2007
Posts: 3,816
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From: :45 minutes from everywhere / E-I-E-I-O
I still say you couldn't get a vacuum leak through that hole.
So we got the #6,#8 boots on the new plugs. If you get OEM wires, with that oversize boot, I HIGHLY suggest pushing very gently the wire through the boot about 3/8", then lockin' onto the plug, and THEN pushing the boot back down.
At first, before screwing in the plug, I tried pushing the new plug into the boot, and the boot was so 'bunched up', it was ready to push the wire back off of the plug.
Pro
Joined: Nov 2005
Posts: 536
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From: Bardstown Kentucky
It's runnin' fine - smooth idle, no hesitation on accel, but how long will it last?
It was an intermittent problem before - 3 instances in 2 weeks, before I broke it down for inspection. All the factory dielectric grease at the spark plug wires was oxidized powder, but those wouldn't trip 41 code ig control open circuit.
Where's HAL9000 to diagnose AE-35 failure time???
It was an intermittent problem before - 3 instances in 2 weeks, before I broke it down for inspection. All the factory dielectric grease at the spark plug wires was oxidized powder, but those wouldn't trip 41 code ig control open circuit.
Where's HAL9000 to diagnose AE-35 failure time???
Safety Car
Joined: Oct 2007
Posts: 3,816
Likes: 0
From: :45 minutes from everywhere / E-I-E-I-O
Update Edit.: Working on DTC H41; Ignition Control Circuit 'OPEN'. First was ICC breakdown and inspection - IC module, coil, Opti, connectors. All was okay, except for 1 SPlug wire not snappin' onto opti. After ICC inspection, wires and plugs were replaced for maintenance,.
This ruled out the one SPlug wire as the fault in the ICC 'OPEN'; the H41 persisted.
======================================== ======================================== ======================================== =================
Old plugs were ok for 83k, except for #8; the electrode was opened up gap a little...
Little bit of anti-seize on the new one (nice glare), little dielectric in the boot (nice glare), and #7 is last up.
This ruled out the one SPlug wire as the fault in the ICC 'OPEN'; the H41 persisted.
======================================== ======================================== ======================================== =================
Old plugs were ok for 83k, except for #8; the electrode was opened up gap a little...
Little bit of anti-seize on the new one (nice glare), little dielectric in the boot (nice glare), and #7 is last up.
Last edited by schrade; Jul 17, 2008 at 08:37 PM.
Melting Slicks
Joined: Oct 2004
Posts: 2,510
Likes: 4
From: Austin Texas
I always wondered how a C4 would run with the tires mounted using the anti-rotation method !!!
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Le Mans Master
Joined: Dec 2004
Posts: 5,789
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From: Myrtle Beach SC
St. Jude Donor '05-'06
Safety Car
Joined: Oct 2007
Posts: 3,816
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From: :45 minutes from everywhere / E-I-E-I-O
We got everything zipped, pulled the trigger, and everything fired right off. Now let's see what happens when it's warmed up.
I did find a vacuum leak. Little hose from the switch next to the throttle body to the TB. New piece, but just not OEM, and the 2 nipples are different sizes. Headed to the store now, so we gotta' wait for a few more...
Vacuum leak was so small, it didn't cause the loping idle. ??? I did hear a swoosh every 20 seconds or so from near the radiator/headlight. Ideas?
Safety Car
Joined: Oct 2007
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From: :45 minutes from everywhere / E-I-E-I-O
Took a ride - 12 miles around town - ran like a champ. Closed loop, no sputter, nothin'. Could it be the one old spark plug wire that didn't snap on to the opti, that caused the 'open' in the ICC circuit???
Nope. Pulled up to my driveway, and it skipped a couple of beats. Got an SES light (DTC 41 doesn't light the SES), and pulled codes H64, and good ol trusty H41.
An 'iffy' spark plug wire does NOT cause an 'open' in ICC.
So we're back to post 23; when I thought I was gonna' have to start fishin' through the harness from the PCM to behind the block and around to the test connector.
If you hear gunshots, the horse is passed.
Nope. Pulled up to my driveway, and it skipped a couple of beats. Got an SES light (DTC 41 doesn't light the SES), and pulled codes H64, and good ol trusty H41.
An 'iffy' spark plug wire does NOT cause an 'open' in ICC.
So we're back to post 23; when I thought I was gonna' have to start fishin' through the harness from the PCM to behind the block and around to the test connector.
If you hear gunshots, the horse is passed.
Thread Starter
Instructor
Joined: Jun 2004
Posts: 174
Likes: 0
From: OH/FL
1) Replaced injectors with rebuilt Bosch III's from Jon at FIC.
2) Replaced spark plugs with NGK Iridium TR55IX
#$@Q#*@#$...the car drives GREAT up until 220deg on the coolant gauge...and then the stutters happen again. Plus, the same three codes pop up (H41,H42,H34).
I'm thinking it could be the Opti...
May need to rip it apart, clean it, seal it up and replace the water pump at the same time...
Any other suggestions? Could be coolant temp sensor for some reason? The only issue I have is that nothing DIES...it just starts to stutter at the same temperature point every time. It's actually like clockwork. After three weeks of this I can tell you within a few minutes when it is going to appear. Very annoying...
2) Replaced spark plugs with NGK Iridium TR55IX
#$@Q#*@#$...the car drives GREAT up until 220deg on the coolant gauge...and then the stutters happen again. Plus, the same three codes pop up (H41,H42,H34).
I'm thinking it could be the Opti...
May need to rip it apart, clean it, seal it up and replace the water pump at the same time...Any other suggestions? Could be coolant temp sensor for some reason? The only issue I have is that nothing DIES...it just starts to stutter at the same temperature point every time. It's actually like clockwork. After three weeks of this I can tell you within a few minutes when it is going to appear. Very annoying...
Safety Car
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From: :45 minutes from everywhere / E-I-E-I-O
I read in one of the other ignition threads that if it's temperature-dependent, it's not the opti.
I get the 'smell' sometimes, and it trips up the misfires at about 215 - every time, along with the H41.
I said cookin' harness because of the smell, and because of rare occasional stray codes I got - H13, H42, H63, H64 - each once or twice since the first H41 on Father's day. (mine ('94) come up under module 1, not 4).
Your H34 is on the same harness as the ICC, but not the same circuit. 2 of the 3 connectors for the MAP are on the PCM black connector harness, just like ICC connectors circuit.
Is PCM the cause? The PCM IS heat-sensitive...
If you can rig 3 by-passes in the ICC test connector on the pass side intake between injectors 4 , 6, and get a multimeter on the 4rth wire, it MIGHT tell you a clue.
I get the 'smell' sometimes, and it trips up the misfires at about 215 - every time, along with the H41.
I said cookin' harness because of the smell, and because of rare occasional stray codes I got - H13, H42, H63, H64 - each once or twice since the first H41 on Father's day. (mine ('94) come up under module 1, not 4).
Your H34 is on the same harness as the ICC, but not the same circuit. 2 of the 3 connectors for the MAP are on the PCM black connector harness, just like ICC connectors circuit.
Is PCM the cause? The PCM IS heat-sensitive...
If you can rig 3 by-passes in the ICC test connector on the pass side intake between injectors 4 , 6, and get a multimeter on the 4rth wire, it MIGHT tell you a clue.
Last edited by schrade; Jul 14, 2008 at 12:15 PM.
Thread Starter
Instructor
Joined: Jun 2004
Posts: 174
Likes: 0
From: OH/FL
I'm a little nervous about the harnesses and the ICC because, with the DelTeq, alot of the stock stuff has been rerouted or (in the case of the ICC) replaced with different components.
Out of curiousity Schrade, how did you fix the problem? I appreciate your explanation, but truthfully I'm going to need a picture, diagram, something visual to diagnose the harness problem...
Also, how can I possibly test the PCM to see if it's the culprit?
Out of curiousity Schrade, how did you fix the problem? I appreciate your explanation, but truthfully I'm going to need a picture, diagram, something visual to diagnose the harness problem...
Also, how can I possibly test the PCM to see if it's the culprit?
Last edited by zeitgeist57; Jul 14, 2008 at 04:49 PM. Reason: Question about PCM testing
Racer
Joined: Jun 2006
Posts: 408
Likes: 0
From: Elkton MD
Stutter at 220
Your noise when 'backing' down sounds like a leaky egr or more likely AIR pump that isn't shutting off correctly. I had a Camaro that suffered that symptom from a bad AIR control and my son's (with those symptoms) had a sticky EGR. His car occasionally ran rough at idle and sounded like it had a race cam.
Please let us know when you solve this and good luck.
Please let us know when you solve this and good luck.
Safety Car
Joined: Oct 2007
Posts: 3,816
Likes: 0
From: :45 minutes from everywhere / E-I-E-I-O
I'm a little nervous about the harnesses and the ICC because, with the DelTeq, alot of the stock stuff has been rerouted or (in the case of the ICC) replaced with different components.
Out of curiousity Schrade, how did you fix the problem? I appreciate your explanation, but truthfully I'm going to need a picture, diagram, something visual to diagnose the harness problem...
Also, how can I possibly test the PCM to see if it's the culprit?
Out of curiousity Schrade, how did you fix the problem? I appreciate your explanation, but truthfully I'm going to need a picture, diagram, something visual to diagnose the harness problem...
Also, how can I possibly test the PCM to see if it's the culprit?
I haven't found the fault yet. It is still intermittent, and heat related (today it started out with the short, so I might be in luck).
A pic of the ICC connector is here:
http://forums.corvetteforum.com/atta...8&d=1212181457
It's the grey 4-wire connector between the two sets of injectors dead center of the pic - all you gotta' do is is pull it apart, and test each for spec.
One thing botherin' me tho', you said H41 after '4' module:
1 "- - -" (Yay! )
4 "H41 H42 H34"
4 "H41 H42 H34"
DTC 42 is the ICC circuit also, diags start the same. Remember, this FSM is '94...
Thread Starter
Instructor
Joined: Jun 2004
Posts: 174
Likes: 0
From: OH/FL
My description was a little more complicated than it is actually done. Someone should have corrected me on it...
I haven't found the fault yet. It is still intermittent, and heat related (today it started out with the short, so I might be in luck).
A pic of the ICC connector is here:
http://forums.corvetteforum.com/atta...8&d=1212181457
It's the grey 4-wire connector between the two sets of injectors dead center of the pic - all you gotta' do is is pull it apart, and test each for spec.
One thing botherin' me tho', you said H41 after '4' module:
In my '94 (87,100), H41 ICC fault is after '1' module, not 4. ???
DTC 42 is the ICC circuit also, diags start the same. Remember, this FSM is '94...
I haven't found the fault yet. It is still intermittent, and heat related (today it started out with the short, so I might be in luck).
A pic of the ICC connector is here:
http://forums.corvetteforum.com/atta...8&d=1212181457
It's the grey 4-wire connector between the two sets of injectors dead center of the pic - all you gotta' do is is pull it apart, and test each for spec.
One thing botherin' me tho', you said H41 after '4' module:
In my '94 (87,100), H41 ICC fault is after '1' module, not 4. ???
DTC 42 is the ICC circuit also, diags start the same. Remember, this FSM is '94...
I was checking the wiring harnesses...what is "spec" for the connectors?
EDIT: Check out reply #11 and after in the attached thread. I am wondering if this harness may be the issue? I'll pull it and check the contact points tonight...
http://forums.corvetteforum.com/show...ghlight=delteq
Last edited by zeitgeist57; Jul 15, 2008 at 10:55 AM. Reason: Added link showing other Corvette owner with same problem...
Thread Starter
Instructor
Joined: Jun 2004
Posts: 174
Likes: 0
From: OH/FL
I appreciate the info! A lot to test...can't do it right now (12:50am)...
I'm starting to become more convinced that this may be a DelTeq "brain box" issue...I'd love to try out another box just to be sure...
I'm starting to become more convinced that this may be a DelTeq "brain box" issue...I'd love to try out another box just to be sure...
Thread Starter
Instructor
Joined: Jun 2004
Posts: 174
Likes: 0
From: OH/FL
Alright, I cleared the codes. For the last day or so it's just down to the H41 and H42...
I pulled the fuel pump and injector fuses...
Cranked the engine for more than 15 seconds...no codes.
Paused and checked the procedures you gave me...
Cranked for another 15 seconds...H18 (Injector Circuit) code trips. Nothing else.
Can you tell me what the "refer to diagnostic aids on facing page" says for this? Thanks!
I pulled the fuel pump and injector fuses...
Cranked the engine for more than 15 seconds...no codes.
Paused and checked the procedures you gave me...
Cranked for another 15 seconds...H18 (Injector Circuit) code trips. Nothing else.
Can you tell me what the "refer to diagnostic aids on facing page" says for this? Thanks!