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I didn't disconnect the battery and did some welding on d exhaust pipes and now my truck starts and works just fine but any of the gages on the dashboard work.what could be wrong?

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Try checking fuses could be blown , check easiest option first

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I need to remove the exhaust manifold on the right side of a 94 4.9l engine in a cadillac deville. It has a broken bolt in the exhaust. What is involved in removing the manifold?


I suggest you use all new exhaust manifold hardware and torque new bolts to 20 Ft Lbs.
4.5L and 4.9L Engines
RIGHT
Disconnect the negative battery cable. Remove the air cleaner. Remove the exhaust crossover pipe. Disconnect the oxygen and coolant temperature sensors. Remove the catalytic converter-to-AIR pipe clip bolt. Remove the upper manifold-to-cylinder head bolts. Raise and safely support the vehicle. Disconnect the converter air pipe bracket from the stud and remove the converter-to-manifold exhaust pipe. Support the engine cradle with screw jacks and remove the rear cradle bolts. Loosen the front cradle bolts and slightly lower the Engine cradle. Remove the remaining exhaust manifold-to-cylinder head bolts, the AIR pipe, and the manifold. Clean the gasket mounting surfaces.
To install:
Install the exhaust manifold and replace the AIR pipe. Tighten the manifold mounting bolts to 16-18 ft. lbs. (21-24 Nm). Install the manifold-to-converter exhaust pipe and replace the converter air pipe bracket to the stud. Raise the Engine cradle and install the rear cradle bolts. Tighten to 75 ft. lbs. (102 Nm). Lower the vehicle. Replace the upper manifold-to-cylinder head bolts. Replace the converter air pipe to AIR pipe clip bolt. Connect the coolant temperature and oxygen sensor connectors. Replace the exhaust crossover pipe. Replace the air cleaner and connect the negative battery cable. Start the Engine and check for leaks.

Mar 28, 2017 | Cadillac Cars & Trucks

1 Answer

What can happen when welding on frame of chrysler truck 1500 with 5.9 engine.


Many electronics have power running to them all the time and are ground controlled, sounds like you blew an electronic component in one of the modules, ECM, BCM, etc... should also disconnect the negative cable while welding to prevent arc'ing back through the electronics.

Oct 17, 2014 | Dodge Ram 1500 Cars & Trucks

1 Answer

1998 Cadillac Deville exaust cross pipe replacement


1) Take it to a muffler shop unless you are a good welder.
2) Procure the new exhaust pipe material.
3) Make the necessary bends in the new pipe to correspond with the layout of the old pipe with a hydraulic tubing bender.
4) Use a band saw to cut the new pipe to lengths using the old pipe as a template.
5) Weld the pieces to form the crossover.
6) Using a cutting torch, cut both exhaust pipes to the length you made the crossover.
7) Weld in the new crossover you just made.
8) If you can't weld with a torch, have no access to a tubing bender and have no way to get the correct exhaust pipe material....take the car to a muffler shop.

Sep 24, 2014 | Cars & Trucks

1 Answer

S320 smoking in gearbox after changing and fixing Exhaust pipes


If any electric welding was used on the car during the exhaust pipe work and the ground clamp wasn't in the proper location, there is a possability that your gearbox might have been damaged (fried).

Nov 17, 2013 | 2002 Mercedes-Benz S-Class

1 Answer

I have a 4.0 Range Rover 2000. didn't pass California smog test. Code P1412 and P1415. How to fix?


P1412 = Secondary Air Injection System Malfunction (Bank 1)
This is from the EOBD section of the manual.
From the SAI section:
If the vacuum operated SAI control valves malfunction, the following fault codes may be stored in
the ECM diagnostic memory, which can be retrieved using ’Testbook’:
P1412 is one of these, particulary described as : SAI system fault (LH side) - air delivery not reaching catalysts.
(DS note. The Left Hand side is as viewed from the drivers seat, not from the front of the enngine bay looking backwards!).
The above system faults could be attributable to anything which might prevent air delivery to the exhaust manifolds (e.g. disconnected or blocked SAI delivery pipe, disconnected or blocked vacuum pipe etc.)

The car runs fine, it must have been a really cold start for this to come up.


P1415 = Secondary Air System, Bank 2, Drive Cycle D: Signal. Land Rover CD lists P1415 as being the result of a disconnected or blocked SAI delivery pipe, diconnected or blocked vacuum pipe, etc.......

Jul 01, 2011 | 2000 Land Rover Range Rover

1 Answer

2002 Kia Spectra - Cracked Manifold/Exhaust


havent seen one yet that works, they last a day or two then exhaust leak is back, how about cutting off the flange and welding in a small piece that has a flange on it, or try to have the pipe welde at a muffler shop.

Apr 23, 2010 | 2002 Kia Spectra

1 Answer

A few weeks ago i installed a air intake and flowmaster muffler on my 99 jeep cherokee. after i took the stock muffler off i realized i needed some wire for my welder so i drove the jeep without a muffler...


My first question would be, "did you disconnect the battery before welding the exhaust?" This could fry the ECU. What codes are you retrieving now?

Mar 08, 2010 | 1999 Jeep Cherokee

2 Answers

I have a leak in my exhaust pipe but my catalytic converter is fine and the toyota dealer wanted me to replace allof it for $1200. I think this is unneccessary why not just fix the hole. I want to take it...


do the second option , there is no need to change the cat. its working perfect , and this is whats the most expensive iten on the exhaust , the dealer is the most expensive place to go anyway , isnt they an exhast and tyre centre to go to for a second opinion .
1200 buck is far far to dear when its just a hole , plus i know the cat can be removed and reused on the new pipe if neededs

teryy from . uk.

Nov 21, 2009 | 2001 Toyota Camry

1 Answer

My aztek 2001got attached with a welding rod of high voltage died


You probably fried the engine control module if you did not disconnect battery first.If so you can go online and order reman unit that you will give them your vin# and the will pre flash program for your car to it.this will be needed toset up correct options.

Jun 11, 2009 | 2001 Pontiac Aztek

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