Question about Cars & Trucks
IF there is a compression loss then have a compression test done to determine if so and which piston . If it is just a miss then isolate each coil until you find the faulty one . If you feel that it is fuel have a fuel pressure test done to determine where the fault is.
Posted on Jul 28, 2013
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Posted on Jan 02, 2017
To review, the check engine light will stay on until the problem is fixed and the code or codes are erased. And if the O2 sensor is disconnected the light will stay on for sure.
Do you have the trouble codes stored in the computer ?
FYI - the cylinders should have over 100psi of compression.
Posted on Sep 17, 2012
Could be hydraulic lifter is holding valve open. Bring no 1 cylinder to TDC firing Lock engine from turning and with adaptor inject air to cylinder. If air comes out intake manifold then intake valve leaking. If comes out exhaust, you guessed it exhaust valve not closing. If comes out sump then bypassing rings. If comes out of radiator , head gasket leak into cooling system
Posted on Nov 17, 2012
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