When warm engine starts instantly but after sitting overnight it only cranks and won't catch the first time I try. When I shut it off and try again it starts immediately. Tapping accelerator has no effect during first crank. If I prime it with some solvent in the air intake it starts immediately. Garage says fuel pressure is ~46 psi, pump is flowing sufficient volume, injectors are working. It has a new ignition coil. MAF and air filter are clean. The start problem began suddenly after a new starter was installed and the oil changed a few months ago. The engine had to be lifted to squeeze the starter into place.
About the same time it also developed a knock on hard acceleration. I just discovered that the knock is helped with enough fuel additives. These additives also helped raise my MPG from 14 to 19 in one shot. I don't know what the timing is or should be. Everyone says they don't know why the MPG suddenly dropped. It had a similar start problem a few years ago which was also helped by priming it and a new pressure regulator and timing adjustment helped but the new garage says they are okay.
P.S. Battery and starter are good, no lights showing on dash, everything looks and sounds right when I turn it on. Throttle-body is clean. I've sprayed cleaner into throttle-body and put into tank. I'm told the injectors are working. Idle is fine once fuel gets to engine. At times it was sounding loud, throaty and "wet" until it warmed up but after driving a bit with the gas additives the engine idle when cold definitely became quieter and smoother and there was no knock on hard acceleration in addition to restoring my MPG to what it was five years ago, for the duration of that tank of gas. (The quantity of additives required to achieve this is above the recommended amount. I'm on my next tank of gas now and additives are diluted.)
About the same time it also developed a knock on hard acceleration. I just discovered that the knock is helped with enough fuel additives. These additives also helped raise my MPG from 14 to 19 in one shot. I don't know what the timing is or should be. Everyone says they don't know why the MPG suddenly dropped. It had a similar start problem a few years ago which was also helped by priming it and a new pressure regulator and timing adjustment helped but the new garage says they are okay.
P.S. Battery and starter are good, no lights showing on dash, everything looks and sounds right when I turn it on. Throttle-body is clean. I've sprayed cleaner into throttle-body and put into tank. I'm told the injectors are working. Idle is fine once fuel gets to engine. At times it was sounding loud, throaty and "wet" until it warmed up but after driving a bit with the gas additives the engine idle when cold definitely became quieter and smoother and there was no knock on hard acceleration in addition to restoring my MPG to what it was five years ago, for the duration of that tank of gas. (The quantity of additives required to achieve this is above the recommended amount. I'm on my next tank of gas now and additives are diluted.)
Jun 17, 2019 at 5:09 PM
