Good afternoon, have tried searching but none of the other threads match my symptoms to be exact Bit of background It's a fresh 14a conversion into s13 for a bit of back ground donor car ran fine. Wired to the usual conversion guide. WOT it's fine, idle is fine Aswell. It's low rpm part load and if I snap the throttle from idle. it just bogs to nothing and if same throttle position.is held it just starts hunting and spluttering Checked TPS and set alignment, checked for air leaks Checked fuel pressure Voltages to what's been wired in are present and correct. I'm at the end of my tether now so any help would be amazing
Adding to the list its fine when cold/warm up phase So looking for something that the ecu ignores/doesn't use during that period? 02' sensor also makes no odds when unplugged Thanks again for anyone that can help shine a light on this
Unplugging ect sensor eliminates it until it's fully up to temp after a drive and it starts to slightly do it Mixture related? As I assume, unplugged it Base sets at the ecu for that circuit. Thus richening it up
I have near enough the same issue, I also have a throttle response delay when tapping accelerator and revs take a age to back down to idle if revved up :/ Im also pulling in more air (vac) than when it was running fine. Ive changed so far: Fuel filter Fuel pump Spark plugs Checked grounds on MAF & Coilpacks Checked coilpacks Unplugged 02 sensor to see if difference Im running out of ideas on mine and getting real fed up! I will reset timing and check TPS next steps for me! long and tiresome process of elimination
how did we all get on... im going to try and have a play this sunday start tracing wires again. got a maf to try so ill let you know how it goes!
Has you tried unplugging coolant temperature sensor when up to temperature and see if symptoms stop? I had something kind of like this on my old skyline.
Have any of you had the ecu read on consult via Nistune or ECUtalk? You'll be able to read the values given and have a better idea of determining the fault. The ECU temp sensor can also cause this kind of fault and if it's been left unplugged in the swap that could be the issue.
Bump from a while ago still scratching my head with this while it gathers dust in the corner of the workshop Since the following has been swapped. Maf Fuel pump Tps (and set up) Coolant sensor Fpr Egr blanked and deleted Checked again for air leaks 02 sensor unplugged makes no odds All grounds are good, battery good If the revs raise above 2.5-3ish k then it runs normally revs can be held and adjusted without any bogging. Idles still perfect If the Coolant sensor if left unplugged it will take a little longer for the fault to occur but will still do it. Dont have access to consult nor is diag port wired in since swap. At the point where I'm looking at buying ecu/loom from a working swapped 13 if anyone's selling
