66 Mustang- 289 V8- has an intermittent surge and rattling noise

There are two easy tests for the catalytic converters. One, use a infrared pyrometer and measure the temperature of both catalytic converters and compair the readings. There should not be much difference between the two if both are flowing correctly. Another easy test is to drill a 1/4" hole before each cat and check for excessive back pressure.

Powertrain[edit] If it's a stock engine, not changed out, probably 132hp.
Engine Years Power 223 CID Mileage Maker I6 1961-64 114 hp (85 kW) 262 CID Mileage Maker I6 1961-64 132 hp (98 kW) 292 CID Y-block V8 1961-64 170 hp (130 kW) 240 CID Straight-6 1965-66 150 hp (110 kW) 300 CID Straight-6 1965-66 170 hp (130 kW) 289 CID Windsor V8 (Mexican market) 1965-66 160 hp (120 kW) 352 CID FE V8 1965-66 208 hp (155 kW)

About 6.5 hours to do the job. Times their labor rate. Buy a flywheel. I can guaranty yours will be bad. Weather is or not.

it is in the front of one of the heads or on the block i think it is the left side just above the oil pan or it is on the back of the heads

throw out bearing.Yes with only 41,000 miles on it it can still go out.But it sounds like its just starting.It could have sat at the dealership for 6mo- a year before anyone drove it making dry spots on the bearings.

No if the oil light has flickered you have oil pressure loss some time just belive the sensor do help us out. lifter do not cause oil pressure loss pressure is built in the rotation of the crankshaft. The knock under the plenum will point you to that cylinder that is affected, (main bearing) as for a 1995 the injectors can only cause a misfire but no knocking noise,will they honor the warranty

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Try adjusting the air-feul mixture or just turn the idle up a little bit. For either of these there would be a screw adjustment near carb

The OEM carb on this model was Motorcraft, and you can get the rebuild kit from Ford or you can look up the model number either in Chilton's manual for that car, or maybe find another (kinda hard nowadays) carb in a junkyard and maybe it still has the tag. You can also research the specs for that motor on a web page of Ford or 2nd party auto parts dealers. I'd bet most mechanics over 40 years old could start you off in the right direction, too.

Vin Number on car drivers side on dash call dealer or do a search on vin #