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Maintenance & Repair Technical Service Bulletins
527 messages, Last post on Sep 24, 2009 at 3:08 PM
You are in the Maintenance & Repair Forum. Your Host is mr_shiftright
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Replying to: rodeojeff (Sep 22, 2007 2:03 pm) DTC 13 Oxygen sensor circuit open/grounded. DTC 23 Intake air temperature sensor circuit Check and make sure that there are no vacuum leaks in the intake, that all the wiring to the O2 sensor and IAT and coolant temp sensors are ok and intact.
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Replying to: 0patience (Sep 22, 2007 9:57 pm)
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Replying to: kiawah (Sep 23, 2007 3:42 am) Wish folks would use the spell check. Saves a lot of confusion. |
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My firebird feels like it is only running on a few cylinders. It has been doing this for a while, it started out by doing it only every once in awhile and now it does it all the time. When I got the car I had to put a fuel pump on it. I have changed the fuel filter, fuel regulator, idle air control sensor, throttle sensor, spark plugs and I have checked the coils and the car is still running bad. I had the computer hooked up to it that tells what sensor is bad but it reads the connector is unhooked...they said when a radio is installed they usually unhook the wire and the computer wont read. Does anyone else know what to try?? We also took the EGR valve off and cleaned it and put it back on then we unhooked it completely and it ran good for a day and now it is running bad again. Could it be the EGR valve?? What could it be??? Please Help!!
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My apologies - I also posted this in a Volvo forum, but I believe it should be posted here instead... This car is a 1996 Volvo 850R sedan, automatic trans with 5 cylinder turbo engine. Are there any know TSB's pertaining to the problem I describe? Over the weekend my car developed a very noticeable tapping sound that appears to be internal to the engine. I can't tell if it's coming from the top or bottom of the engine... The problem occurred while accelerating to enter the interstate while the turbo was producing about 15PSI. The tapping sound is consistent with increase and decrease in RPM's. Other than the tapping sound, the engine appears to be operating as normal - no misfiring , hesitation, knocking etc. The car has 96,000 original miles on it and has been maintained very well. The current oil is Penzoil full synthetic 10W30. Can anybody offer suggestion as to where to begin? Is this a known problem with this engine? Any info will be greatly appreciated. Thanks!!
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Replying to: esommer (Nov 13, 2007 9:29 am) There were new tappets available for your engine in 1997. But unless you were having a problem, they were not a warranty item. And if it is the lifters making the noise, then you have a bigger problem than the lifters. You must first determine exactly what is causing the noise. Other than that, there aren't any noise TSBs regarding the engine that I can find for your vehicle.
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Replying to: 0patience (Nov 13, 2007 5:22 pm) Thanks again.
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Replying to: esommer (Nov 15, 2007 4:00 am) Had to chuckle on that one. Personally, if the noise is tappet noise, then you may want to find an Import shop that specializes in Volvos and ask them how much they would charge for diagnostics on the noise. Then go from there. As for the heads, if the tappets are the noise problem, then resurfacing the valves and seats and new seals should be the only thing needed. The problem is, until you know for sure where the noise is coming from, there are too many variables to even offer suggestions on it. |
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Replying to: swiseman25 (Oct 22, 2007 5:42 am) 
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Replying to: 95fbody (Nov 16, 2007 7:00 am) |
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