Emulate injectors - how?
From : peter
Q: a short block is just the block and its internal components pistons connecting rods crank but does not include the cam pushrods heads intake ... short block will generally include the cam and lifters. any that do not are better left in favor of those that do. i guess that depends on stock or performance. a basic stock short block may come with a cam but not a performance one. if you were going stock why would you use a short block anyway several reasons bad rod excessive ring wear broken crank while all true in most cases like this people would just replace the entire engine. the time saved and the warranty in most cases more than make up for the extra cost of the engine itself. anywhere else use a long block; the extra dollars wil be saved on not having to re-do the heads agreed. -- if at first you dont succeed youre not cut out for skydiving .
Replies:
From : hugh
ramman@dodgecity.cc wrote uscgret@comcast.net writes just a follow-up 87 burns at a faster rate than 91 octane fuel. also use what your owners manual or the manufacturer recommends. i know my autos say use 87 and my bike says use 87 or higher. i use higher because it prevents knocking when the bike gets hot especially in traffic. coasty is correct; 87 octane gasoline does burn faster. regarding the previous posters comment about refineries that too is correct. gasoline is gasoline. the refineries all crank out 87-octane regular-unleaded. what makes the difference in 87 or 89 or higher octane gasoline is additives. contrary to urban legend 91 or 93 octane gasoline is not more highly refined or more pure. gasoline is gasoline period. when your vehicle runs poorly on a certain brand and better on a different brand octane rating otherwise being the same likely what is causing the performance difference is the additives. different brands use different formulations based on their own research and marketing. yes gasoline is also custom-blended for different areas altitudes seasons and emissions performance. you are wise to follow your owners manual when selecting the fuel octane rating. if your vehicle performs poorly on the recommended octane then perhaps you should take it to the dealer to find out why. using a higher-than-recommended octane is foolish. it may give you a warm fuzzy feeling to squander money needlessly but youre impressing no one. lower octane gas does burn faster than high octane but only under identical combustion chamber conditions. octane is nothing more than a measure of the anti- knock characteristics of a given fuel. running higher octane than what the manual calls for or throwing in those bottles that raise the octane level only keep company ceos happy and your wallet thinner. jerry .
From : hugh
after changing the fuel filter i need to bleed the low pressure fuel supplyline - i followed the manual loosen banjo bolt turn key to crank position and release to on did this many times but still getting no fuel in this line - any suggestions .
From : bill putney
pump is running - i can hear it. .
From : bill putney
http//www.discountvantruck.com/truck/000truckseats/000seating/40-20-40/splitbench/knightridertruckseatsexp.htm i was a curious if they are any good. how do you like them clay -- there are 10 kinds of people in the world those who understand binary and those who dont. .
From : paul morgan
are you sure it was a press fit most uppers in chrysler product trucks & older rear drive cars are screw in. mabee they changed the design in the newer ones but if the joint has flat sides around the top its a threaded situation which would explain it not staying put. ive welded quite a few of these that were stripped out with long lasting success but always on the vehicle. the best way to get proper alignment restored will be at an alignment shop. good luck. .
From : steve
yeah the gas cap is tight. funny thing this morning i put gas in it and noticed that it says if the cap isnt tight the check engine light could come on! when i got to work a guy i work with suggested unhooking the negative battery cable for a few minutes. i did and now the light isnt on. i then did the code again with the ignition and it came up p done. hopefully the problem is resolved thanks to all for your input. .
From : austin shackles
on or around thu 2 jun 2005 234910 +0100 hugh hugh@127.0.0.1 enlightened us thusly there may be a fuel pressure sensor which would be triggered iirc late volvos have one. incidentally my fuel pump does not run continuously. there is a pressure switch on the rail which controls it. if you listen you can hear the pump start up then after a few seconds switch off when first switching on the ignition. however my 3.5 hotwire which may not be the same system runs the pump initially when you switch on as you describe and then stops but aiui this is because it detects no ignition activity but when you turn the engine the pump starts again and appears to run continuously thereafter. i run my lr 4.0 litre v8 with injectors running and pump off and have done so for 50k+ miles. switch back to petrol and absolutely no problem. we did this on the advice of a technical consultant in this field who advised us that these injectors do not rely on petrol for any form of cooling or lubrication. however i dont recall whether he was actually referring to all injectors. on mine again i have 2 relays which interrupt the injector supply to each bank; these have a wiring loom with 4 sockets and 4 plugs; you unplug the injector plug from the injector and plug it into the socket instead then plug the other end of the wiring onto the injector. they have a delay on switch-off which allows the lpg to get through from the mixer. -- austin shackles. www.ddol-las.fsnet.co.uk my opinions are just that confidence before important work meetings boost your confidence by reading a few pages from the tibetan book of the dead from the little book of complete b***ocks by alistair beaton. .
From : daniel j stern
on fri 03 jun 2005 013701 gmt gene gene@bigfishtackle.com wrote 1990..cummins 252000 miles..never a problem but ive noticed i cant hear that whistle anymore when i leave the back window open. why the turbo is still winding down when i shut the engine down & get out & walk to the tailpipe... old age tinnitis i cant hear mine wind down because the constant ringing in my ears from years of working around jets drowns it out ;- .
From : daniel j stern
on thu 2 jun 2005 hugh wrote incidentally my fuel pump does not run continuously. there is a pressure switch on the rail which controls it. youre sure youre not seeing a fuel pressure regulator if you listen you can hear the pump start up then after a few seconds switch off when first switching on the ignition. thats how most all electric pumps are set up -- most systems dont toggle the pump with any kind of a pressure switch though. the momentary pump run upon switching the ignition on is just the prime pulse. usually just a plain old temp/time pump duration lookup in the ecm or even just a fixed-time momentary run. ds .
From : daniel j stern
why dont you just disconnect the fuel pump and let the injectors operate normally. im not sure thatd be wise. many injector designs depend on fuel flow to cool the solenoid windings i.e. to prevent them overheating and cooking. im not sure its a good idea too. fuel pumps are designed to work continuously and disconnecting it could be yet another reason for cel to come on. peter .
From : athol
daniel j. stern wrote on thu 2 jun 2005 bill putney wrote by the time you got thru buying parts and taking the time to wire up and debug your one-of-a-kind design youd wish you had chosen the simple off-the-shelf solution. that there is an engineering truth. bill did i ever tell you about the turn signals on the um solar car of 99 i dont recall ever hearing it. lay it on me! bill putney to reply by e-mail replace the last letter of the alphabet in my adddress with the letter x .
From : austin shackles
jesters1 wrote my 80 d50 has two fuel filters under the hood one inline at the carb and a bigger one mounted to the wheel well. the bigger one has one line going in from the fuel pump and two going out to the carb. i cant find a dual output filter anywhere so does anyone know of a workaround i was thinking of using a single output filter and putting a y on the line out to the carb. will that setup flow enough it may run just fine like that. i bet it would cost you less than $10.00 in parts to try it. .
From : steve
why dont you just disconnect the fuel pump and let the injectors operate normally. im not sure thatd be wise. many injector designs depend on fuel flow to cool the solenoid windings i.e. to prevent them overheating and cooking. im not sure its a good idea too. fuel pumps are designed to work continuously and disconnecting it could be yet another reason for cel to come on. while it is possible that the fuel injectors may overheat the cel will not be set by the fuel pump being disconnected. -- if at first you dont succeed youre not cut out for skydiving .
From : peter
peter wrote dodge durango 99 5.9l converted to run on lpg single point. when running on lpg injectors are disconnected to prevent them from working or rather the common positive lead is routed thru resistor so that voltage drop on injectors is insufficient for them to operate and naturally pcm complains about open injector circuits. alldata is pretty vague about p0201-p0208 codes and only says if induction kick is not detected pcm will set the code. apparently it checks not just for correct resistance but also for the inductive kick. anybody knows how to properly emulate injectors on this engine peter if it were me id probably just ignore the check-engine light - but i wonder if you could wind a set of 8 iron-core electromagnets to be the same inductance as a fuel injector and then have the lpg system cut over to the bank of dummy injectors. the fact that they dont have a moving pintle might affect the waveform a bit but i bet it wouldnt be enough to trip the computer. it would add a lot of complexity since you would have to put in 8 relays to switch over from the real injectors to the dummies intstead of a single relay to cut in the resistor on the common side. .
From : bill putney
hi all i have a 2001 dakota with the 4 cylinder five speed and last evening i was coming home from work and noticed the mil was on. anyone have an idea as to what it could be before i go and have to spend money for a mechanic to tell me its something simple and charge an arm and leg for it i had an old chevy cavalier at one time and the check engine light was on and it was the pcv valve. i was wondering if thats what this could be or an oxygen sensor or something it has 41000 miles on it by the way. thanks in advance. any info or tips are greatly appreciated! .
From : peter
just buy an emulator! i know aeb make them for 4 6 and 8 cylinder vehicles. wireing it in takes under an hour too dodge durango 99 5.9l converted to run on lpg single point. when running on lpg injectors are disconnected to prevent them from working or rather the common positive lead is routed thru resistor so that voltage drop on injectors is insufficient for them to operate and naturally pcm complains about open injector circuits. alldata is pretty vague about p0201-p0208 codes and only says if induction kick is not detected pcm will set the code. apparently it checks not just for correct resistance but also for the inductive kick. anybody knows how to properly emulate injectors on this engine peter .
From : tbone
dodge durango 99 5.9l converted to run on lpg single point. when running on lpg injectors are disconnected to prevent them from working or rather the common positive lead is routed thru resistor so that voltage drop on injectors is insufficient for them to operate and naturally pcm complains about open injector circuits. alldata is pretty vague about p0201-p0208 codes and only says if induction kick is not detected pcm will set the code. apparently it checks not just for correct resistance but also for the inductive kick. anybody knows how to properly emulate injectors on this engine if it were me id probably just ignore the check-engine light - ive considered that ;- however this way i may miss other reasons cel is on but i wonder if you could wind a set of 8 iron-core electromagnets to be the same inductance as a fuel injector and then have the lpg system cut i dont know what is the injector inductance. alldata only specifies resistance of 12 ohms over to the bank of dummy injectors. the fact that they dont have a moving pintle might affect the waveform a bit but i bet it wouldnt be enough to trip the computer. it would add a lot of complexity since you would have to put in 8 relays to switch over from the real injectors to the dummies intstead of a single relay to cut in the resistor on the common side. yep 8 relays it is. ive considered it but this would mean ungainly bundle of wires relays and coils of unknown inductance or injectors from junkyard. are there relays that will switch 4/8 separate circuits peter .
From : robh
my 02 dakota has been the most trouble free vehicle ive ever owned. if it is such a lemon then sell the damn thing already. -- if at first you dont succeed youre not cut out for skydiving john smith jones wrote hi just bought an 02 dakota. 86000 miles. any tips you can give me would be helpful. thanks bob i guess its to late to tell yo about my 2002 dodge dakota lemon. you have my condolences. jam .
From : peter
peter wrote just buy an emulator! i know aeb make them for 4 6 and 8 cylinder vehicles. wireing it in takes under an hour too fairly pricey. a good 4-cyl emulator with coils instead of resistors will cost about 70$ equivalent of. do you know where in eu i can mail-order them for less peter far better get another set of injectors use the same connectors neat job. if you want to cool them use water and a small circulation pump and a small heatsink aluminium box. when i have developed ecus its always been better to use real loads. wire wound resistors do not give the same load characteristics. happy tinkering. .
From : nathan lucas
just buy an emulator! i know aeb make them for 4 6 and 8 cylinder vehicles. wireing it in takes under an hour too fairly pricey. a good 4-cyl emulator with coils instead of resistors will cost about 70$ equivalent of. do you know where in eu i can mail-order them for less peter .
From : tbone
on thu 2 jun 2005 tbone wrote why dont you just disconnect the fuel pump and let the injectors operate normally. im not sure thatd be wise. many injector designs depend on fuel flow to cool the solenoid windings i.e. to prevent them overheating and cooking. .