Strange hesitation and stutter through revs on 93Max
Cos
11-06-2003, 12:40 PM
Have tried another Maxima forum but got no responce so I hope you guys can help.
This will bake your noodle because I have spent the weekend trying to fix my dad's 93 Max SE. It is the model with the HT leads and therefore it does not have coil packs.
I have read through this thread several times amoungst other threads to do with the same problem but from what I can gather, there are a few people posting problems on this thread that are having slightly different symptoms, but could be resolved by the same fix.
Nevertheless, before I started doing any diagnostics on the ECU, I made sure that the leads sat in the distributor well and sprayed a bit of WD40 to make sure that there was no damp. Ensured that the leads were sat well on the sparks and checked that all other connections were ok. It has had new sparks, HT leads, fuel filter, and oil and filter.
After the initial checks, I check the ECU and got the following sequence which I could not understand because the instructions did not allow for this code. Maybe someone here has also come across this. The first 2 numbers that came up were 1 and then 2. These were quick flashes. The following numbers that came up were 3, 4 then 5. These were slow flashes. I couldn't work out whether this meant 0102 and 0345, or 1203 and 0405 or 1234 with 5 being the end of code indicator. I was a bit baffled to say the least. I don't have the list to hand now but one of the codes said that there was something wrong with a clutch solenoid. I found this a bit hard to beilieve as the car is an auto.
I then started the car from cold and on tick over it was very lumpy. If I touched the gas gentle, the revs would rise but would be very unstable. If I reved it hard, they would rise quicked but you could hear and feel the missing. I reversed it out of the drive and when I put it in "Drive" and put my foot on the gas, I could hear some missing/back firing but once the revs rose slightly, it went ok. It just seemed like there was a problem with the initial take off. I have put 2 loads of injector cleaner through it and have been using 98RON fuel. I refuse to believe that there is anything wrong with the MAFS s this would normally show different symtoms such as the cant get over 2K-2.5K rev. I cant see how a dodgy spark plug would give this kind of symptom, and the same with the distributor cap or coil. I have had problems with the above 3 on a couple of other cars and the symptoms have not been the same.
Once over 2K revs, the car seems to drive ok but its as if there is something wrong with the timing. The next thing I was going to try was to remove the O2 connector but I ran out of time.
However, one thing that I have noticed a couple of people say is that they have changed the ECCS relay but as there is no UK Haynes manual so I have been struggling a little bit whilst working on the car. Therefore, can someone tell what it is and where it can be found please.
Also, is there anyone on this forum with a Maxima of the same generation that is based in the UK, preferably in the midlands, and also if anyone knows if there any specialists for this motor in the UK, again near the midlands. Please don't say Nissan because they couldn't diagnose a cold if someone sneezed in their face! No-offence to any Nissan techies on the forum.
why would a faulty Knock sensor cause back firing/hesitation? Is it because it can not acurately gauge the signals coming from the engine and is sending spurious signals to the ECU, hence causing the timing to be constantly adjusting? I have never come across a problem like this before.
Also, I'd like to have a little dig at Nissan here because they obviously didn't want certain Maxima owners to be able to easily clean thier TB's. After I realized that half the manifold had to be removed I decided against it.
There you go, moan over.
Cheers
Cos
This will bake your noodle because I have spent the weekend trying to fix my dad's 93 Max SE. It is the model with the HT leads and therefore it does not have coil packs.
I have read through this thread several times amoungst other threads to do with the same problem but from what I can gather, there are a few people posting problems on this thread that are having slightly different symptoms, but could be resolved by the same fix.
Nevertheless, before I started doing any diagnostics on the ECU, I made sure that the leads sat in the distributor well and sprayed a bit of WD40 to make sure that there was no damp. Ensured that the leads were sat well on the sparks and checked that all other connections were ok. It has had new sparks, HT leads, fuel filter, and oil and filter.
After the initial checks, I check the ECU and got the following sequence which I could not understand because the instructions did not allow for this code. Maybe someone here has also come across this. The first 2 numbers that came up were 1 and then 2. These were quick flashes. The following numbers that came up were 3, 4 then 5. These were slow flashes. I couldn't work out whether this meant 0102 and 0345, or 1203 and 0405 or 1234 with 5 being the end of code indicator. I was a bit baffled to say the least. I don't have the list to hand now but one of the codes said that there was something wrong with a clutch solenoid. I found this a bit hard to beilieve as the car is an auto.
I then started the car from cold and on tick over it was very lumpy. If I touched the gas gentle, the revs would rise but would be very unstable. If I reved it hard, they would rise quicked but you could hear and feel the missing. I reversed it out of the drive and when I put it in "Drive" and put my foot on the gas, I could hear some missing/back firing but once the revs rose slightly, it went ok. It just seemed like there was a problem with the initial take off. I have put 2 loads of injector cleaner through it and have been using 98RON fuel. I refuse to believe that there is anything wrong with the MAFS s this would normally show different symtoms such as the cant get over 2K-2.5K rev. I cant see how a dodgy spark plug would give this kind of symptom, and the same with the distributor cap or coil. I have had problems with the above 3 on a couple of other cars and the symptoms have not been the same.
Once over 2K revs, the car seems to drive ok but its as if there is something wrong with the timing. The next thing I was going to try was to remove the O2 connector but I ran out of time.
However, one thing that I have noticed a couple of people say is that they have changed the ECCS relay but as there is no UK Haynes manual so I have been struggling a little bit whilst working on the car. Therefore, can someone tell what it is and where it can be found please.
Also, is there anyone on this forum with a Maxima of the same generation that is based in the UK, preferably in the midlands, and also if anyone knows if there any specialists for this motor in the UK, again near the midlands. Please don't say Nissan because they couldn't diagnose a cold if someone sneezed in their face! No-offence to any Nissan techies on the forum.
why would a faulty Knock sensor cause back firing/hesitation? Is it because it can not acurately gauge the signals coming from the engine and is sending spurious signals to the ECU, hence causing the timing to be constantly adjusting? I have never come across a problem like this before.
Also, I'd like to have a little dig at Nissan here because they obviously didn't want certain Maxima owners to be able to easily clean thier TB's. After I realized that half the manifold had to be removed I decided against it.
There you go, moan over.
Cheers
Cos
Cos
11-08-2003, 11:13 AM
They should rename this place to "The Tumbleweed Forum".
Automotive Network, Inc., Copyright ©2025