S2A109RAG

Please someone shed some light on this horrible little problem. Up until 2 days ago the O2 sensor was happy and reading on Mega-tune while data logging. Now for some reason the gauge on mega-tune reads Red and fully around to the right at 28. Is this normal? is the sensor just cooked? the wiring hasn't been changed since the first start up 6 months ago........... Or is there a setting that I may have changed and not realized?

Yes, I wasn't feeling so adventurous, so I got the Kit out of the UK from Nige. It was a great feeling to gave it start and run...... I'm out in Rolleston enjoying a monster frost.

I have nearly finished a MS build, I may have some spare parts if you get stuck Regards

Spot on, Thanks for your help and eagle eye on that one...... It now runs like it should....

Fail!!!!!!!!!!!!!!!!! The temp sensor plug had not had the pins seated correctly....... click... and their in...... starts first time every time.... Cheers Nige, Although If you have a suggestion on how to get it to Idle below 2000RPM that would be great

Although as Nige has mentioned its running rich as hell..... It runs better than it ever did...........................!!!

Well bugger me!!!!!!!!!!!!!!! Here i was thinking fuel maps and O2 sensors. How marvelous. I will take a look at the little sucker this evening...... Nige? Will this also affect or solve the high Idle speed????? Regards Jason

Well, it seems you are on the right track. After removing the plugs..... all 8. and replacing them with another set(not new) it fired up first turn. the 8 i removed are soaked in fuel. Is there a solution for this issue of flooding? of course it will not start again after running for a time. not that im complaining... it runs!!! it idles at 2200rpm ( nicely ) no hesitation revving at all. no Air leaks..... that I can see. I also have no reading on megatune for water temp.... but it comes up fine on the gauge. although I do need to sort the radiator........ it is blocked up...

Well after a battle getting to the start stage of this Megasquirt install I turned the key today..... It just burst into life.... just amazing... sounds so different to the old setup... PROBLEM,,,,,,,,,,,,,,,,,,,,,,,!!!!!!!!!!!!!!!!!!!!! I turned it off...... And for the life of me the nasty thing will not start............... Any ideas????? I have touched nothing. so it started. it ran for 20min.... no hastles. turned it off. Tried to start it again straight away.... no good.!!!! Is this a common fault? do I have enough earths?

Well after a battle getting to the start stage of this Megasquirt install I turned the key today..... It just burst into life.... just amazing... sounds so different to the old setup... PROBLEM,,,,,,,,,,,,,,,,,,,,,,,!!!!!!!!!!!!!!!!!!!!! I turned it off...... And for the life of me the nasty thing will not start............... Any ideas????? I have touched nothing. so it started. it ran for 20min.... no hastles. turned it off. Tried to start it again straight away.... no good.!!!! Is this a common fault? do I have enough earths?

Well today was the day.... I started it and it ran but rattled and rattled and rattled till I could no longer stand the rattling. I think I'm going to pull the oil pump off and re-check it..... just in case. Also It has a nasty miss, like it's down on more than one cylinder. I need to check the Leeds I made.... Now would this be caused by the Alternator not charging? as after a few minutes of running Mega tune starts to drop off and the motor wants to stall..... I guess this system likes a healthy supply of voltage. Also does the alternator require power in? from the ignition switch?

Well, after a few hours of Assembly today I think I should be ready to fire it up tomorrow. Fingers crossed it will do as it should....! Nige, What is you 5.2 built from? I have been told a 5L can be made from a 3.5 block with a small hone and a 4.4L layland P76 crank?

Thank's Gentlemen, I did consider the 16 spanner rattling around theory but I just wasn't sure. it just sounds so punishing. On closer inspection the lifters are dry, so as recommended they are in a luxurious bath of oil. Just while I have your attention, is there any specific way to place the lifter in the hole? ie does the hole in the lifter need to face in any direction in particular?

Hi Nige, It is the 3.9 V8 V belt kit you sent out to me in NZ. The first fire up was successful but the noise coming from the engine was horrific.... I pulled the front off the motor 3 times to try and find the issue but to no avail. In the end I put an engine I know is a good runner with no noises or smoke in to my RRC..... Plugged the MSQ up to it and crossed my fingers and turned the key. Unfortunately I was greeted with the same horrific tapping noise. As you can see from the last picture I have pulled this engine to bits and have found nothing out of the ordinary. I will replace the lifters to be sure but other than that I'm lost as to how to fix this???????????? Do I need to prime the lifters somehow? I don't believe there is any issue with the wiring as it seems to talk to mega tune and shows all gauge's. I have oil pressure.... lots of it. as you can see in the picture there is oil for Africa.... Any suggestions????

After weeks of fighting a battle I thought I had won, I finally started my Newly Megasquirted 3.9V8............. It burst into life........But Idled way to fast with a nasty Knock/Tapping. Needless to say I was not impressed as this was a perfectly good running engine.... I went through everything top to bottom, from wiring to relays to ECU but I couldn't find anything out of place? I then decided that I would swap the motor for another running unit which I had other plans for...... After installing this engine I went through all of my wiring and double triple checked everything is in the correct place....... The moment of truth. I turned the key and.......................... Same thing. Idles at 2200RPM and a nasty knock/tap. I am picking it is a timing issue.... Is the trigger wheel able to cause the timing to be out far enough to run at this speed? Will a vacuum leak cause the timing to advanced far enough to cause this idle issue? Are there any setting I have over looked in Megatune? is the timing going to be different due to the rubbish fuel we have down here? Any help would stop any more grey hairs...............

Its a VBelt 3.9 V8. The 3.5 cam Is locally made one from down here ( New Zealand ) I think I will Just buy a new Cam. Any suggestions? Its in a RRC for off road use.....

I have a refreshed 3.9 V8 which I have just about finished MegaSquirting. Now the Engine has had some work done on it and I have pulled the front off to replace the Cam ect. The Issue I have is the cam I have is from my old dead 3.5V8. This is an aftermarket cam which was magic in the 3.5 but I have a feeling that it is not quite right for the 3.9? is this true? Is there a 2deg difference?

I have a Tired 3.5 V8 which has had an aftermarket cam installed 6 months ago.... Will this cam be a suitable replacement for a 3.9 V8 which I now have to replace the older 3.5 V8 unit? Both Engines are V belt. The 3.9 has had all new lifters and refreshed heads. ( Has not been run yet )

I have just purchased a 3.9 V8 to replace a tired 3.5 V8 for my RRC. It came with all of the loom's, computer and a little surprise in the form of 2 O2 Sensors..... Do I really need to to fit these to get the best out of the Motor? Or is it common practice to bypass these units somehow? Either way is no issue but some advise would be good... Thanks