Question about 1994 Pontiac Bonneville
I recently changed my fuel pump, and had the suggestion by a couple of helpful people on fixya to check the wires to the pump to make sure they were not pinched and shorting. i did and they seem to be ok after routing them a bit better. it will still start up a few times or more,then blow the injector fuse again. is there a reason it only does it when started? it runs great and doesnt blow when driving thank goodness,any help is greatly appreciated.
CHECK FOR THE CONTINUITY OF THE WIRES FROM TERMINAL TO TERMINAL AND FROM TERMINAL TO THE GROUND.
Posted on Jun 17, 2015
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Posted on Jan 02, 2017
SOURCE: black smoke from exhaust
im dave; hope i can help
First you need to determine if it is actually black smoke or if it is blue smoke. There are three colors of smoke that can come from the tailpipe. It is not white smoke obviously because that is easily differentiated from blue or black and generally indicates water or antifreeze leaking past the head gasket and into the compression area of the motor. White smoke is the steam of the water/antifreeze being emitted
Blue smoke is caused by engine oil entering the cylinder area and being burned along with the fuel air mixture. As with white smoke, just a small drop of oil leaking into the cylinder can produce blue smoke out the tailpipe. Blue smoke is more likely in older or higher mileage vehicles than newer cars with fewer miles. The car has many seals, gaskets, and o-rings that are designed to keep the engine oil from entering the cylinder, and one of them has failed. If too much oil leaks into the cylinder and fouls the spark plugs, it will cause a misfire(engine miss) in that cylinder, and the spark plug will have to be replaced or cleaned of the oil. Using thicker weight engine oil or an oil additive designed to reduce oil leaks might help reduce the amount of oil leaking into the cylinder.
Black smoke is caused by excess fuel that has entered the cylinder area and cannot be completely burned. Another term for excess fuel is "running rich". Poor fuel mileage is also a common complaint when black smoke comes out of the tailpipe. Black smoke out the tailpipe is the least cause for alarm. Excess fuel will usually effect engine performance, reduce fuel economy, and produce a heavy fuel odour in the engine compartment. Some of the causes of excess fuel are a carburetor that is out of adjustment which is not likely unless you have installed an aftermarket carburated system on your non-carburated car, a faulty fuel pump, a leaky fuel injector, or a faulty engine computer or emissions sensor. If black smoke is present, check the engine oil to make sure excess fuel has not contaminated it. Do not start the engine if a heavy, raw fuel smell can be detected in the engine oil. Check the above mentioned systems and after detecting the trouble replace the faulty parts and then the engine oil and filter.
Posted on Jul 20, 2008
did u follow the wire from the tank even check the plug there if the car drove fine for ten mins then u must of went over the short some where get a cheap multimeter turn the key on and go from there check everything oh and umm take a deep breath im sure u can find it lookfor anything chafed exposed broken wires
Posted on Aug 19, 2009
mcdevito75 here, I would try to isolate the problem with the fuse blowing, ---- sit in the car and step on the brake, without the car running see if the fuse blows, the just put the key to on not strat just on see if the fuse is blow, if it is you may have a problem under the dash, if not, now with the key just on no start, step on the brake see if that fuse is blow, if so you may have a problem at the brake light switch under the dash or at the brake lights themselves at the back of your car, a bad ground, loose or broken wire, inspect if you can. The hard or no starting after you drive for a while could be related or a problem with the ignition coils or ignition module. In any event have your local auto re[pair shop check these items out for you, a short could cause real problems in your car.
Posted on Jul 09, 2010
SOURCE: fuel pump fuse
short to ground likely on fuel pump circuit.. trace from tank up frame rail to PCM.. you probably pinced it though when you replaced pump so look carefully at wiring at between tank and body
Posted on Oct 03, 2012
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