spf_lexus
Active Member
- Messages
- 2,266
- Location
- Murrieta California
So I have this ignition miss that has been a B**** to sort out for the last year and I need to find out whats wrong. I have been throwing money at this engine with new wires/plugs/dizzys/rotors and I have horrible misses around 1800-2200rpm. My WOT is fine, really pulls when I lay the pedal down all the way but if I have ANY LESS PEDAL, the car cuts off for a second until I either floor it 100% or lay off to 20%. I manage fine cruising around in this "all-or-nothing" situatuion but there's no way to compfortably part throttle over 2k.
-My first guess is my camshaft sensors... both have been sawed in half more than once from timing belt and this was from not re-routing the wires correctly. I re-spliced the wires and elec-taped but no sure if they are seeing electrical interference? The inner jackets of the cam sensors have a wire weave that I am guessing rejects interference?
-My second guess is my 16 year old ignition coils.. both are denso originals but don;t want to spend another $180 on coils if they are not bad. I have my battery re-located in the trunk and I have the main Positive lines routed to the trunk via nickel distribution block and three 4-gauge lines and the block inself is a matter of inches from the driver side coil... possible interference?
I do not have any vacuum leaks and my grounds are fine. I notice this miss when I am in a particular gear and need to open throttle w/o changing gears... and it feels like something is not in check. This always happens when im cruising on freeway at 75mph and I start to climb a hill and when the throttle opens to add air/fuel/spark to accordance to the increased needs of the incline but this is EXACTLY where I get the jumpy misses. I used to think the miss was ONLY at zero vacuum/zero boost hinting at a malfunctioning MAF but it also happens under vacuum cruising as well.
-My first guess is my camshaft sensors... both have been sawed in half more than once from timing belt and this was from not re-routing the wires correctly. I re-spliced the wires and elec-taped but no sure if they are seeing electrical interference? The inner jackets of the cam sensors have a wire weave that I am guessing rejects interference?
-My second guess is my 16 year old ignition coils.. both are denso originals but don;t want to spend another $180 on coils if they are not bad. I have my battery re-located in the trunk and I have the main Positive lines routed to the trunk via nickel distribution block and three 4-gauge lines and the block inself is a matter of inches from the driver side coil... possible interference?
I do not have any vacuum leaks and my grounds are fine. I notice this miss when I am in a particular gear and need to open throttle w/o changing gears... and it feels like something is not in check. This always happens when im cruising on freeway at 75mph and I start to climb a hill and when the throttle opens to add air/fuel/spark to accordance to the increased needs of the incline but this is EXACTLY where I get the jumpy misses. I used to think the miss was ONLY at zero vacuum/zero boost hinting at a malfunctioning MAF but it also happens under vacuum cruising as well.