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1987 V12 MOTOR START BUT IS NOT RUNNING ON ALL 12 RAW FUEL IS GOING TO THE EXHAUST. IT HAS NEW PLUG WIRES, DISTRIBUTOR CAP ETC.

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IT SOUNDS LIKE BAD INTAKE GASKETS OR VALVES

Posted on Nov 16, 2009

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1992 GMC Sierra that has failed smog test twice. The motor is not burning gas, the gas is going straight through.


Has your check engine light come on? If so, have the code read and deciphered. When you say "the gas is going straight through", do you mean that there is raw fuel coming out the exhaust pipe? If no codes are present, you should start with a tuneup - plugs, wires, distributor cap, rotor, points or inductive pickup, fuel and air filters. If the fuel isn't being burned, you have some kind of ignition failure, AND raw gas in the exhaust will fail the hydrocarbon test in a heartbeat. Original exhaust system? Including catalytic converter(s)? If so, converters are probably trashed by now. Good luck.

Sep 30, 2013 | GMC Sierra Cars & Trucks

1 Answer

My car wont start


It doesn't matter if the exhaust is leaking if the car won't start. The smell... does it smell like gasoline? If you have a new alternator and battery, then I would focus on the fuel system. Fuel pump, fuel injector, leaking fuel line, bad spark plugs, bad distributor cap, bad spark wires, oxygen sensor, etc.

Sep 30, 2013 | 1992 Volvo 740

2 Answers

Sputtering on 1994 nissan altima


check fuel filter,or fuel injectors, fuel pressure regulator.Also check fuel filler cap.Check exhaust system for plugged catalytic converter,muffler,bent exhaust pipes,etc.

Feb 17, 2013 | 1994 Nissan Altima

1 Answer

Raw fuel


Is your check engine light on?
Your truck is running rich(obviously), I'm wondering if your CEL is on because it will come on, if the O2 sensor/s are bad.
And that would make your truck run rich(upstream sensors)

May 23, 2012 | GMC Sonoma Cars & Trucks

1 Answer

I have a 1990 mitsubishi might max it wont run smooth unless you keep your foot on the gas and keep the rpms up a little bit and it wont drive cause it stalls everytime you try to move it. ive replaced the...


You've already eliminated the spark plug & wireset, distributor cap & rotor.
Sounds like your car needs a tune-up, specifically, the PCV (positive crankcase ventilation) valve, and/of the EGR (Exhaust Gas Recirculation) valve.

Components checked/replaced during a tune-up are:
air filter
motor oil
motor oil filter
breather filter
fuel filter(s)
fuel strainer
PCV valve
EGR valve
spark plugs
spark plug wires
ECM or distributor cap & rotor
cabin air filter
transmission oil filter
transmission oil
engine coolant
check all vacuum hoses and lines

Troubleshooting the no-start condition - from the 1990 Mitsu Mighty Max Repair Manual:

Priority Action Part Type -- Cause
1 Inspect Battery -- Battery Discharged or Faulty.
2 Inspect Battery Cable -- Corroded, Broken, Shorted or Poorly Connected Battery Cable.
3 Inspect Distributor Cap -- Distributor Cap Cracked or Burned.
3 Inspect Fuel Filter -- Clogged or Dirty Fuel Filter.
5 Inspect Ignition Coil -- Faulty Ignition Coil.
6 Inspect Wireset -- Worn, Damaged or Faulty Spark Plug Wire(s).
7 Inspect Spark Plug -- Incorrectly Gapped or Fouled Spark Plug(s).
8 Inspect Starter -- Starter Motor Faulty.
9 Inspect Fuel Pump -- Low Fuel Pressure.
10 Inspect Solenoid Switch -- Faulty Starter Solenoid Switch.
11 Inspect Fuel Pump Relay -- Faulty Fuel Pump Relay.
12 Inspect Fuel Injector Pressure Regulator -- Faulty Fuel Injector Pressure Regulator.
13 Inspect Ignition Switch -- Improperly Connected or Faulty Ignition Switch.
14 Inspect Starter Drive -- Faulty Starter Drive.
15 Inspect Fuel Injector -- Dirty or Worn Fuel Injectors.
16 Inspect Fuel Pump Strainer -- Clogged or Dirty Fuel Pump Strainerat.
17 Inspect Engine Control Computer -- Incorrect Operating Information Being Delivered and Sent From The EEC.
18 Inspect Fuel Tank -- Fuel Tank Empty.
19 Inspect Carburetor -- Carburetor Flooded or Faulty Choke.
20 Inspect Distributor -- Worn, Loose, or Incorrectly Installed Distributor.

Aug 17, 2011 | 1993 Mitsubishi Mighty Max

1 Answer

I have an escort zx2-2001 engine that it takes me two tries to start especially when on hills. When it does start there is alot of raw fuel smell emiited from the exhaust. Ive changed the fuel filter,...


If you're smelling unburnt gasoline, then it sounds like you're not getting fire to all cylinders. Not sure if your car has coil paks or distributor, but which ever it has, I would check to make sure all cylinders are firing. You can do this by starting the engine and pulling the wires off the coil paks/distributor one at a time. Listen and watch for any change or variation in the running of the motor. If it trys to die out then that plug is getting fire. If nothing changes in the way the motor runs, then it's a good possibility that that cylinder isn't firing. Hope this helps.

Mar 17, 2011 | 2001 Ford Escort ZX2

1 Answer

Use too much gas


Check that your Exhaust Gas Recycling Valve (EGR) is not stuck or plugged. A percentage of exhaust gas is recycled through your intake manifold. If the 10 percent,15 percent, 20 percent, etc.exhaust gas is not sent through the intake manifold it has to be replaced with fuel /air mixture. Using more fuel/air instead of spent gas lowers your fuel economy. Other things, try using fuel system cleaner in your gas, make sure your air cleaner is not dirty or plugged, new plugs can make for smooth running, bad distributor cap, bad wires , etc.

Dec 18, 2010 | 1997 Honda Civic

1 Answer

Glowing exhaust manifold on passenger side


was this a direct rplace engine? why , how and when is this "glowing determined? Need to know.

May 10, 2009 | 1987 Chevrolet G20

1 Answer

Won't start


take a little bit of starting fluid and spray into the air cleaner and try starting it. if it fires this way you have a bad fuel pump. and also take the cap off and spin the motor over to see if the rotor is moving because i have seen the distributor shafts in these older trucks break off so they will not spin

Apr 14, 2009 | 1987 Dodge Dakota

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