My 93 talon has a 2.0 n/t 4g63 in it ive changed the coil pack wires plugs. has a new head thought it might be a bad crank angle sensor or a throttle position sensor. its properly timed (as long as your not supposed to advance the timing) and i have tried running fuel additives and i cant figure it out. ideas?
I would start with checking the fuel pressure and boosting the fuel with spraying carb cleaner into the air intake hose.
It sounds like you are not getting enough gas into the cylinders.
Could be a vac leak too.
SOURCE: Rough idle until warm
HMM, ya ont get a code unless ya figure out how to read the morse code values the OB1's use. Hmm sputters, and rough idle can be from poor air circulation, as well fuel delivery.
first air.......inspect and clean your vacuum hoses, cracks and leaks will most notably ruin your day. as well as the performance of your ride. check the seal for your intake hose around the throttle body, then clean the ports in and around your throttle body as well. Bad air supply, poor idle.. follow me..
second is fuel delivery. Your getting your gas, thats evident, but are you getting the required amount. hard to guage unless you disconnect a line and test its pressure. so lets USE the KISS method.. KEEPING IT SIMPLE STUPID
first, check and or replace your fuel pressure regulator...
second, inspect condition of your fuel filter.
thrid, and certianly the last thing, your fuel pump. go in that order. or your gonna seriously annoy yourself when a 5 dollar fix turns into a 3-400 dollar fix.
SOURCE: 1992 Lumina Backfire - I
I know you mentioned the EGR valve has been replaced, but you may have a bad 'new' part. I know the car is electronic, but has anyone checked its ignition timing (timing belt been looked at, I know it only has 77k on it). Is the fuel pressure regulator OK and it vacumm supply?
SOURCE: 99 olds silhouette... changed plugs wires and coil
will try to help,are you sure the fuel pump comes on and runs through the whole cycle of turning key on for 10 seconds through at least 5 cycles? the timing light may be picking up the crankshaft positioning sensor signal, it's magnetic pulse. and then again you could be dealing with a bad timing chain or belt,most likely chain driven. am trying to help, but not sure unless i hear it onsite. at least this may point you to something. sorry at no charge, hope this helps and thank you for choosing fixya.com if no help please repost!!!1
SOURCE: my 93 towncar runs rough
YOU HAVE INTAKE MANIFOLD LEAK ALSO COULD HAVE BAD OR STICKING INTAKE VALVES. CODE PO 226 IDM SIGNAL NOT RECEIVED AND CODE PO 542 FUEL PUMP SECONDARY CIRCUIT.
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