Croc Posted May 11, 2019 Share Posted May 11, 2019 Somehow I am not shocked that you think more clearly asleep than awake. That explains a lot. Let's face it, I don't need beauty sleep to be as ruggedly handsome as I am. So I have a lot of awake time to do productive thinking. :seeya: Link to comment Share on other sites More sharing options...
1turbofocus Posted May 11, 2019 Share Posted May 11, 2019 I have a few questions Are you running a o2 sensor and running closed loop at idle and part throttle ? Do you have a wideband air fuel gauge installed ? If so what is it reading ? Hands down the best plugs for the Zetec is Motorcraft SP463 gaped at .050 Tom Link to comment Share on other sites More sharing options...
Vovchandr Posted May 11, 2019 Author Share Posted May 11, 2019 Firstly, thank you all for all your help so far. I have a few questions Are you running a o2 sensor and running closed loop at idle and part throttle ? Do you have a wideband air fuel gauge installed ? If so what is it reading ? Hands down the best plugs for the Zetec is Motorcraft SP463 gaped at .050 Tom To answer a few questions and catch up on the thread. Nothing motor wise has been touched since I bought it and sorted out some of the cooling/oil dripping issues. Part of full disclosure while trying to test/get my radiator fan to kick on I very briefly might have hit the upper temp range a few times before shutting it off. Small chance of a blown head gasket? (yet to be tested but temperature is fine/lower now if anything. I put in a lower temp thermostat too). Performance wise over the last ~500 miles it has been pretty much consistent. Certainly peppy/fast but not certain if its running 100%. Certainly dont randomly break traction under throttle with the alleged ~200hp+ per original builder. I don't know how my O2 is running. i can only assume it does its regular open/closed loop procedure. No wideband installed. I have some kicking around from other projects so it might be a good idea to put that in. I'll do the new plugs as one of the first things in further troubleshooting/partitioning. Vacuum trick has gotten most of the crud out! Link to comment Share on other sites More sharing options...
1turbofocus Posted May 11, 2019 Share Posted May 11, 2019 Need to do a datalog and see what your front o2 sensor is doing , a bad o2 can cause bad MPG , running bad , etc Tom Link to comment Share on other sites More sharing options...
Kitcat Posted May 11, 2019 Share Posted May 11, 2019 I once reasoned that, since I did not have a catalytic converter, I could run leaded gas in my Zetec(:. That messed up the O2 sensors and performance went away. Maybe just replace the O2 sensors and see if that helps? Link to comment Share on other sites More sharing options...
TurboWood Posted May 11, 2019 Share Posted May 11, 2019 That is indeed a lot of carbon. Do these engines run closed loop? Daniel Link to comment Share on other sites More sharing options...
1turbofocus Posted May 12, 2019 Share Posted May 12, 2019 He said he had a o2 sensor if he does then its running closed loop , Car starts in open loop , times out to closed loop , the o2 controls the closed loop fueling at idle and part throttle then past a giver RPM or TPS depending on how he has it set up changes to open loop for WOT Tom Link to comment Share on other sites More sharing options...
JohnCh Posted May 12, 2019 Share Posted May 12, 2019 Are you sure the O2 is narrow band? The Pectel is pretty sophisticated so i'd be surprised if it doesn't use a wide band and have an interface that shows live AFR, or better yet, log it. -John Link to comment Share on other sites More sharing options...
1turbofocus Posted May 12, 2019 Share Posted May 12, 2019 Are you sure the O2 is narrow band? The Pectel is pretty sophisticated so i'd be surprised if it doesn't use a wide band and have an interface that shows live AFR, or better yet, log it. -John He might have the higher end pectel that uses the 5 wire wide band , he can look at the wideband and tell , 4 wire or 5 wire on the stock o2 sensor A log to see what the o2 is doing would be the first thing I would be doing Tom Link to comment Share on other sites More sharing options...
Vovchandr Posted May 12, 2019 Author Share Posted May 12, 2019 Quick updates. Changed the plugs to recommended Motorcraft SP463 gaped at .050. Drove it highway 20 miles, went through 1.9 gallons. Drove back on secondary roads as another way to partition to see if its something to do with higher RPM/6spd gearing. Haven't had a chance to refill it but will post that data once I have it. http://www.usa7s.net/vb/attachment.php?attachmentid=15347&stc=1 Currently looking into all the Pectel Data logging software and profiles and ordering the cable to make it all work. Didn't have a chance to cross reference the o2 sensor but I looked this morning and it's a 4 wire OEM Ford. Link to comment Share on other sites More sharing options...
Davemk1 Posted May 12, 2019 Share Posted May 12, 2019 I wonder about the coolant temp sensor being bad and causing it to run in warm-up mode all the time. dave Link to comment Share on other sites More sharing options...
1turbofocus Posted May 12, 2019 Share Posted May 12, 2019 4 wire means stock O2 as you said , you need to log the STFT1 = Short Turm Fuel Trim bank 1 and see what its doing , If its a old o2 I would change it and log it Tom Link to comment Share on other sites More sharing options...
Vovchandr Posted May 14, 2019 Author Share Posted May 14, 2019 Still looking into things but a small update Decided to double check my injectors to eliminate that as a variable. I knew they got swapped to high impedance (I checked that long ago) but was time to make sure they were correct overall. They check out. (I believe) Denso 968F-AC https://www.injectorplanet.com/products/denso-2881 14.3 Ohm resistance 21.1 lb per hour Flow rates @ 43.5 psi / 3 bar Link to comment Share on other sites More sharing options...
1turbofocus Posted May 14, 2019 Share Posted May 14, 2019 Yes 10-14 Ohm would be High Impedance Injector Tom Link to comment Share on other sites More sharing options...
Vovchandr Posted May 15, 2019 Author Share Posted May 15, 2019 (edited) Yes 10-14 Ohm would be High Impedance Injector Tom I thought impedance was spot on but couldn't be sure of the other values were proper, (LB/PSI). Thanks for confirming. Before I keep troubleshooting through the weekend and next weeks can anybody (Tom?) tell me if my lower temp thermostat could be a factor? As of right now here is whats pending. Getting my communication cable today to communicate with Pectel T2 ECU > get software to work with windows, get a profile on there through the weekend. (There are two, data logging and actual changing variables it seems) DescPro + PiToolbox + Offload tool Find my Wideband and find a spot to drill/plug another hole to monitor AFR Compression test the motor Drive a certain distance off the highway at lower RPMs and remeasure the MPG (6spd is at 4k+ at highway, possibly something high RPM Map related) Edit: Also adding changing fuel filter to the mix... because why not? Edited May 15, 2019 by Vovchandr Link to comment Share on other sites More sharing options...
JohnCh Posted May 15, 2019 Share Posted May 15, 2019 In addition to what has been mentioned above, I'd confirm that the fuel pressure regulator is doing it's job. If current fuel pressure is much higher than what what was used to create the map, your mpg (and power) will drop. -John Link to comment Share on other sites More sharing options...
Vovchandr Posted May 15, 2019 Author Share Posted May 15, 2019 In addition to what has been mentioned above, I'd confirm that the fuel pressure regulator is doing it's job. If current fuel pressure is much higher than what what was used to create the map, your mpg (and power) will drop. -John Good idea, I'll do that too. Quick question but relevant, the car seems a little hard to start but I always wrote it off as a nature of the beast. I'll take a video but should the car fire right up like a normal car or is it normal for it to struggle a bit with things like Jenveys? Take what seems like at least a few rotations to get going. If unusual it could be another symptom of whatever fuel issue. Link to comment Share on other sites More sharing options...
JohnCh Posted May 15, 2019 Share Posted May 15, 2019 I have a 2.0L Duratec with Kent DTEC10 cams, some head work, and Jenveys. It's mapped correctly and fires up just like my real cars. -John Link to comment Share on other sites More sharing options...
11Budlite Posted May 16, 2019 Share Posted May 16, 2019 Just for reference, I had a 2.0 Zetec in my Birkin with Jenvey ITB's, Emerald ECU, and stock cams and my MPG was between 21-22 and 28-29 depending on conditions and how enthusiastic I was. Your MPG is really low and I agree with what's been said before. I'm interested to see what you find. Link to comment Share on other sites More sharing options...
1turbofocus Posted May 16, 2019 Share Posted May 16, 2019 What I would do first it get the datalogging working and check the STFT1 , This will tell you what the main sensor is doing that control's your idle and part throttle fueling , then install the wideband air fuel gauge , that way if the front o2 isnt responding we can get an idea of your A/F and where to go next When you get it logging I will be glad to remote into your laptop with teamviewer and take a look at things with you and try to help Tom Link to comment Share on other sites More sharing options...
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