Shutters and turns off?

Tiny
DANIEL47
  • MEMBER
  • 2002 CHEVROLET SUBURBAN
  • 5.3L
  • V8
  • RWD
  • AUTOMATIC
  • 180,000 MILES
Just replaced my intake manifold gasket now it will not stay on. Started fine before I changed gasket now it starts and shutters and turns off feels like not enough fuel or air in the line or engine combustion problem not sure. Any information would be appreciated.
Tuesday, October 10th, 2017 AT 1:17 PM

32 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Check that you do not have a vacuum leak at the manifold, any old gasket remaining can cause a problem, and re check all connections, it will probably be something simple that you have over looked. Re post if you cannot find anything. Also, run a scan as this may point you in the right direction as well.
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Tuesday, October 10th, 2017 AT 3:49 PM
Tiny
DANIEL47
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  • 6 POSTS
Will do. Checked all connections will check again.
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Tuesday, October 10th, 2017 AT 4:45 PM
Tiny
MHPAUTOS
  • MECHANIC
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Okay, please keep me informed so I can be of assistance if required.
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Tuesday, October 10th, 2017 AT 5:41 PM
Tiny
DANIEL47
  • MEMBER
  • 6 POSTS
Thinking spark plugs. This is what truck is doing
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Saturday, October 21st, 2017 AT 5:49 PM
Tiny
DANIEL47
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  • 6 POSTS
Checked all connections. Re installed gasket. Still won't stay on. At a loss
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Saturday, October 21st, 2017 AT 5:54 PM
Tiny
MHPAUTOS
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The video even sounds like a vacuum leak, the gasket is correct? All traces of the old gasket removed? Manifold not warped? Have you sprayed brake clean around the manifold to see if it changes revs? This must be something that you have disturbed if all was good before you removed the manifold.
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Sunday, October 22nd, 2017 AT 1:09 AM
Tiny
DANIEL47
  • MEMBER
  • 6 POSTS
Yes no sign of old gasket cleaned very well. Manifold doesn't look warped. If I turn key truck will start and then turn off but when I turn on and rev it 3 times will stay on but rough idle until I turn off.
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Sunday, October 22nd, 2017 AT 9:45 AM
Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Remove and clean idle air control, it may have some muck from cleaning blocking passage, try this next.
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Sunday, October 22nd, 2017 AT 6:17 PM
Tiny
BIG BLUE 2
  • MEMBER
  • 2 POSTS
  • 2001 CHEVROLET SUBURBAN
  • AUTOMATIC
  • 180,000 MILES
When starting from a stop sign at a very slow speed (5-10 mph the transmission seems to stutter or shake when going to the next gear! This doesn't happen when accelerating at a faster speed. Any suggestions and possible cost?
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Monday, January 6th, 2020 AT 9:54 AM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Have a trans guy look at this it may be a torque converter going bad.
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Monday, January 6th, 2020 AT 9:54 AM (Merged)
Tiny
BIG BLUE 2
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Thanks for your response. Any idea on the cost to repair or replace?
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Monday, January 6th, 2020 AT 9:54 AM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
No because it could be something else
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Monday, January 6th, 2020 AT 9:54 AM (Merged)
Tiny
MOKJWK11
  • MEMBER
  • 2 POSTS
  • 2000 CHEVROLET SUBURBAN
  • V8
  • 4WD
  • AUTOMATIC
  • 130,000 MILES
I have a 2000 Chevy Suburban with 130000 miles. At speeds over 30 or so @ 2000-2200 rpm it shudders like we are driving over a washboard road. We get no error codes and it only occurs during slight aceleration, as soon as the throttle is let off or pushed harder it stops immediately. I was told it may be the torque converter lock up so I serviced the tranny and added 2 doses of lucas additive to no avail. I have pulled the relay for the tc lock up & saw no change. Recently the exhaust started rattling so I checked it for loose hangers etc, moved the exhaust pipe back & forth as much as possible, rattle stopped & no vibration for a day then back to same vibration & rattle. I have read there is a service bulletin for an exhaust vibration but can't believe the exhaust could make the car shudder so violently, anyone have any ideas?
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Monday, January 6th, 2020 AT 9:54 AM (Merged)
Tiny
CARADIODOC
  • MECHANIC
  • 33,871 POSTS
Tight universal joints.
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Monday, January 6th, 2020 AT 9:54 AM (Merged)
Tiny
XZH445
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Mokjwk11, did you get any resolution? I have a '98 Suburban 1500 4WD and it is acting exactly like your symptoms
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Monday, January 6th, 2020 AT 9:54 AM (Merged)
Tiny
MOKJWK11
  • MEMBER
  • 2 POSTS
Havent had a chance to check u joints yet but I can't imagine that's the issue. Am on vacation & working on it this week will update when the issue is resolved.
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Monday, January 6th, 2020 AT 9:54 AM (Merged)
Tiny
JIMMY25
  • MEMBER
  • 6 POSTS
  • 1997 CHEVROLET SUBURBAN
  • V8
  • 4WD
  • AUTOMATIC
  • 235,000 MILES
The owner has said the problem is intermitant but becoming more frequent.
The engine seems to stutter while accelerating from a stop light. Once the rpms come up it seems ok. It does it more frequent with fuel level below 1/3. The fuel pump seems pretty loud. The pressure reads 52 at idle. When you accelerate either standing still or driving, it moves up to 60 psi momentarily and drops back to 52. If you let off the throttle it drops to 52 right away. The book says it should be 60 to 66. Is there a fudge factor? Or absolutely not, 60 to 66 is where it has to be. I have used two different gages and both read the same. I changed the fuel filter and rechecked pressure. No difference.
At one point I was able to get it to stumble while in neutral. The gage was at a fairly steady 52 psi.
I also removed the EGR valve to check for obstacles. It looked ok.
It is a 5.7L CSFI.
The intake manifold was very recently resealed due to a coolant leak at the drivers side front coolant cross-over. It has not changed the stutter issue
Any suggestions?
No check engine light.
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Monday, January 6th, 2020 AT 9:54 AM (Merged)
Tiny
BMRFIXIT
  • MECHANIC
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Fuel pressure should be CSI 60-66 or for SFI 56-62
In both system fuel pressure a bit low and if not know but soon fuel pump need to be replaced
Check spark plugs
Spray distributor cap and coil with water and soap mix check for spark leak
Ground a test light and run it at and around the cap, coil, and wires
If have the flat distributor cap almost certain it's at fault
Hook scanner and check distributor and CAM for adjustment
Good luck
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Monday, January 6th, 2020 AT 9:54 AM (Merged)
Tiny
CARADIODOC
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Also look at the rear transmission mount. If it has sagged, the driveshaft will have less of an angle and a greater tendency to vibrate.

If you have a two-piece driveshaft, check the rubber mount for the center bearing. You may have to run it in gear jacked up on a hoist to see what is moving around or vibrating.
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Monday, January 6th, 2020 AT 9:54 AM (Merged)
Tiny
JIMMY25
  • MEMBER
  • 6 POSTS
How often is the fuel regulator the problem? The pressure only seems low, not irratic.
Also it does have the flat cap. If that were it, why would it only do it occasionaly? It goes for long periods where it is just fine. It does act up more after it is been running for a while. I was also going to say that when I changed the fuel filter, I got about 30 1/16" beads of water. Is that about normal?
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Monday, January 6th, 2020 AT 9:54 AM (Merged)

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