eyefi Posted August 23, 2004 Share Posted August 23, 2004 what does the SAFC do to the fueling on startup? it looks like it uses the adjustment for the bottom RPM position. ive never used or seen one before now, but a friend is having problems getting his 650cc injector car to start. Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted August 23, 2004 Share Posted August 23, 2004 Eyefi is this Richie? I spoke with him last week about it. If it were me I'd swap the stock narrow band sensor first then retry Quote Link to comment Share on other sites More sharing options...
eyefi Posted August 23, 2004 Author Share Posted August 23, 2004 aye it is, we where trying to solve a boost issue but never got chance cos the bloody thing would not start. in the short time we had we swapped out the FPR and monitored pressure, checked & cleaned plugs and all that was fine. we were gonna have another look when he had got his new pressure tank on. i'll swap the o2 and see what it does. its strange that the car started not starting immediately after injectors, pump, SAFC and FPR. and it really is a bastard to get started. Quote Link to comment Share on other sites More sharing options...
Matt Harwood Posted August 23, 2004 Share Posted August 23, 2004 I've got 650's on my car, (although I'm using the E-manage, the principle is the same), I have no start-up issues at all. It barely needs much adjustment to get it to idle properly (about -8% get's me an AFR of around 14.7). On a cold start, the AFR drops to about 10.5 for around 2 minutes, but that's never caused me a problem. However... Before we did the single conversion, I new I had an inlet air leak. This played havoc with idle and cold start. I had to back the E-manage off by about 25% and cold starts were unreadable on my AFR guage, but I knew it was stupidly rich due to the black smoke it would produce at idle. Obviously the stock ECU was trying to hard to compensate. Might be worth checking the inlet for leaks. Mine was a poor screw thread/fitting of an external pressure sensor, and leaky trac removal kit. Quote Link to comment Share on other sites More sharing options...
eyefi Posted August 23, 2004 Author Share Posted August 23, 2004 yeah we found an inlet leak but that didnt solve or help the starting problem, got better boost response though Quote Link to comment Share on other sites More sharing options...
Matt Harwood Posted August 23, 2004 Share Posted August 23, 2004 Originally posted by eyefi its strange that the car started not starting immediately after injectors, pump, SAFC and FPR. and it really is a bastard to get started. mine started playing up after the injectors were changed. I knew the air leak was there, but it had not caused me any real problems before. Once the plugs get fouled up, especially after a few continous cold starts, it's PITA to restart. Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted August 23, 2004 Share Posted August 23, 2004 Eyefi the narrow band will be trying to bring the AFR to stoich. If it's fubar then it can't, where as the stock 440's should be almost there on the map. The SAFC only starts at 1000rpm from memory so can't affect the idle. You could raise the idle to 1100 and see what happens. Quote Link to comment Share on other sites More sharing options...
Matt Harwood Posted August 23, 2004 Share Posted August 23, 2004 Do you know what AFR's you're getting at idle? Quote Link to comment Share on other sites More sharing options...
eyefi Posted August 23, 2004 Author Share Posted August 23, 2004 its running rich, the plugs where brown after only a few hundered miles. it started ok after cleaning no1 plug, but that was probably just coincidence. nah, didnt get to check AFR, no bung and im not sure how to get a good reading up the tail pipe (so to speak). looking at my wideband info it doesnt look like a very accurate reading can be acheived from the tail pipe, the further in the better. Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted August 23, 2004 Share Posted August 23, 2004 to get a decent reading you need to be 500mm up the tail pipe. Do you understand what I am saying about the narrow band mate? BTW how did the aeromotive go? Quote Link to comment Share on other sites More sharing options...
eyefi Posted August 23, 2004 Author Share Posted August 23, 2004 Originally posted by Terry S Eyefi the narrow band will be trying to bring the AFR to stoich. If it's fubar then it can't, where as the stock 440's should be almost there on the map. so the o2 is trying to adjust before the engine fires? Originally posted by Terry S The SAFC only starts at 1000rpm from memory so can't affect the idle. You could raise the idle to 1100 and see what happens. yeah, it does. while cranking and watching the adjustment value in monitor mode it is adjusting the fueling by what is set at the 1krpm point. so i thought it actually used this value while cranking, it would make sense. my powerFC has bloody loads of settings for cranking fuel adjustments, i'd expected the SAFC to have something for cranking, but i could'nt find anything. Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted August 23, 2004 Share Posted August 23, 2004 so the engine won't actually catch on the 650's? Quote Link to comment Share on other sites More sharing options...
eyefi Posted August 23, 2004 Author Share Posted August 23, 2004 Originally posted by Terry S BTW how did the aeromotive go? still not got a running motor mate, so no joy yet. it could still be a month or so before it is rebuilt. if u need it back just let us know and i'll post it on for ya. my posting has been a bit out of sequence. Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted August 23, 2004 Share Posted August 23, 2004 No worries I'll shout if we need it Will the engine not fire at all on the 650's?? Quote Link to comment Share on other sites More sharing options...
eyefi Posted August 23, 2004 Author Share Posted August 23, 2004 Originally posted by Terry S so the engine won't actually catch on the 650's? it wont for ages, then it just does out of nowhere, after its been left for a while. it just cranks, it doesnt even try catch, but when it does it just starts. we have fuel pressure and dry plugs. i expected to pull a plug and see it wet through. the coil loom isn't in great shape which also doesnt help, but it seems to b making good contact. when its running its fine (except for no number2 turbo occasionally), no stalling or hesitation. Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted August 23, 2004 Share Posted August 23, 2004 sounds very weird mate. adjust the idle to 1100 and retry. Quote Link to comment Share on other sites More sharing options...
eyefi Posted August 27, 2004 Author Share Posted August 27, 2004 just a bit of an update. the car starts fine first time if the SAFC (LO 1krpm) is set to +20% when starting from warm. the car also has a MINES ECU fitted, this seems to have some different coolant temp vs enrichment map than stock ecu. we r trying a stock ECU this weekend (cheers terry). still cant make the sequental system work correctly though, bastard. Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted August 27, 2004 Share Posted August 27, 2004 eyefi, Rich hasn't texted me his address for the ECU mate!! Quote Link to comment Share on other sites More sharing options...
Ian C Posted August 27, 2004 Share Posted August 27, 2004 Originally posted by eyefi just a bit of an update. the car starts fine first time if the SAFC (LO 1krpm) is set to +20% when starting from warm. the car also has a MINES ECU fitted, this seems to have some different coolant temp vs enrichment map than stock ecu. we r trying a stock ECU this weekend (cheers terry). still cant make the sequental system work correctly though, bastard. That's odd, I've found that the idle and warm-up needs serious leaning-off of the airflow to work properly, yet you are boosting it by 20%? Hows that work? Those MINES ECU's are a pain in the ass for piggyback tuning IMO... What's up with the sequential system then? -Ian Quote Link to comment Share on other sites More sharing options...
dandan Posted August 27, 2004 Share Posted August 27, 2004 Just out of interest how much stuff was actually swapped on the car in the period of reliable starting to unreliable starting? 650 injectors Aeromotive Fuel Pump SAFC? No flat battery or jump starting or anything like that? Anything ignition related like plugs or coli packs? Have they been disturbed at all? Disturbed/damaged any wiring at the ecu connector if/when SAFC was installed? Are you getting reliable spark when cranking 100% of the time? SOunds electrical to me, any fault codes from the ecu? Ian - what issues have you had with the Mines ecu? Dudes seems fine with his piggybacks and Matt only seems to have that rich point at seq changeover point with the EManage on board, no start up problems. Quote Link to comment Share on other sites More sharing options...
eyefi Posted August 27, 2004 Author Share Posted August 27, 2004 terry, i'll give him a ring. ian, yeah it seems weird. richard just tried it randomly and it started. we thought it was just coincidence, but it works every time. it hasnt been checked with the wideband yet, but its almost a stock start, probably about 1.5 crank rotations. the sequential system is playing the old run ok, sometimes late no2, sometimes no no2. it has new turbos (hybrids), we have swapped the 3 main vsv's (air/exhaust/ prespool) and actuators (air/exhaust). cant find any leaks in the pipework and it has a new pressure tank. Quote Link to comment Share on other sites More sharing options...
eyefi Posted August 27, 2004 Author Share Posted August 27, 2004 dan, starting to not starting when hot (starts fine from cold), things that changed:- plugs pump FPR 650cc's inj SAFC set to -18% in general none of this has been done by me. the ignition loom has some broken connectors, so is not in great shape, but runs fine once started. spark is regular (at least on no1). plugs where dry but a bit brown (rather than buff) after a few hundred miles, a bit rich and cans of octane booster crap. no errors in ECU. no jump start that i know of. i havent checked the loom yet. is the same thermostat used for the temp gauge and ECU? Quote Link to comment Share on other sites More sharing options...
dude Posted August 27, 2004 Share Posted August 27, 2004 I have a Mines ECU, ITC, SAF-C and IK27's and my car starts and idles perfect hot or cold !!!!! It also seems to run pretty well on the road or track !!! Sounds like no fuel is getting thru when its cranking !!! Dude:flame Dev Quote Link to comment Share on other sites More sharing options...
eyefi Posted August 27, 2004 Author Share Posted August 27, 2004 it has fuel and pressure on cranking. Quote Link to comment Share on other sites More sharing options...
dude Posted August 27, 2004 Share Posted August 27, 2004 Fuel and pressure and spark should = running dude Dude:flame Dev Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.