Bike,What was causing the car to have no spark?
Jay in MA
I drove the car today and same thing happened.The car "bogs" when first going, then picks up speed.
I am going to purchase a timing light (my light broke) and check the timing.
The check engine light comes on and goes off intermittently.
I did the jumper in the diagnostic plug and got codes 24 and 52.
My manual says problem with IAT and problems with knock sensor circuits.
Both could be due to bad ECM. I wonder if bad timing could also give these IAT and knock sensor codes?
I will check it again tomorrow.
Any experience with this symptom or these codes??
I am not exactly sure what caused it to not have spark, but I swapped the distributor with a new $205.00 one from e-Bay and it fired up after I swapped ECM. I put the old ECM back in and it still worked. I also charged the battery with a Battery Tender and made sure it had a full charge.
Today I took four other ECM's I had in my garage and one at a time I slaved them in and took the car for a drive (except for ECM #2 - it did not even start with that one). Most of the time the fault code of 52 came and everytime the CEL came back on.
I followed the Toyota repair manual and found that the spliced in wire to the ECM turned out to be for fault code 52.
It is the knock sensor. I could not get the connector off the sensor (it is on the aft side of the engine) because it is too tight.
I noticed that the regular wire at the ECM for the knock sensor was cut and spliced into the ECM with coax wire was a replacement.
The outer shielding was grounded on the firewall and the other end was touching the inner core of the wire. I straightened that out and cleared the fault code and went for a ride. It seemed like it was running fine, did not hesitate and the CEL did not come on again. I took my daughter for a ride and it was a big disappointment because the CEL came back and so did the same fault code. I have the knock sensor from the original engine and I metered that and it checked good. If I can get the sensor off the replacement engine I will try and swap it out tomorrow.
I will also check the wiring. I may even run another wire (not coax - no shielding). I have other engine main electrical harnesses with the connector and might need to use a piece of one.
I checked with Kragen Autoparts and they sell new knock sensors - the Nippondenso is $169 and the Mitsubishi is $193.
I think I will just use a used one.
If I can get this knock sensor problem fixed, then I think the car will run great and be ready for sale.
Further updates to follow.