bad idle until I unplug the 3 bar map

[SkyeTy]

Re: bad idle until I unplug the 3 bar map

i had a problem sort of similar to this, my aldl wouldn't connect, i had a check engine light, and when i unpluged the map it idled a bit better. it was idleing really high and rich. i just sprayed out my chip and socket a few times with electrasol and it was better. but i also had my ecm rained on. its worth a try, i never thought that would have solved my problem after i spent about six hours breaking my knuckles

 

[Trapper]

Re: bad idle until I unplug the 3 bar map

I have the 3bar chip and 3bar map but I notice on the Datamaster it won't come out of the open loop after its warmed up? I will have to go get some electrasol. Oh yea I forgot to mention the wife is pissed about this purchase, truck no running :rant:

 

[JSM]

Re: bad idle until I unplug the 3 bar map

Depends what/who did chip. It might be set to not go out of openloop.

 

[Trapper]

Re: bad idle until I unplug the 3 bar map

Erue programed it for one closed loop program, I have it on 0 right now which should be the closed one, I'm told it still could be the distributer, I'm going to talk to Aaron today and see what he says.

 

[Luke]

Re: bad idle until I unplug the 3 bar map

0 is the emissions setting it will run like ass if you leave it on 0, its OK for puttin around and idle but thats about it, tyr 1 IRRC it the most conservitive

 

[Trapper]

Re: bad idle until I unplug the 3 bar map

I will try that, I was told to keep it on 0, I don't know, since the rain keep comming and going?

 

[Luke]

Re: bad idle until I unplug the 3 bar map

0 was used to get through emissions tests using closed loop, all the other settings are open loop, the numbers were the fuel settings with low timing and 1 being the lowest and the letters were higher timinf and increasing fuel as you progerrsed up the alphabet.

I'm recalling this off of memory, I may have them switched around, I sold my TT chip a while back and now have a Waller chip that works pretty good also

 

[Davemc1963]

Re: bad idle until I unplug the 3 bar map

Just had another thought to try and eliminate things.
I've added some things below for others reading this post, I've just reread the threads and some of what I am writing is probably not relavent to you except the dissy bits. Anyway if it helps someone..
Have you checked the timing? My timing was erratic when I checked it with a strobe with the bad dissy. Have you checked your timing with the EST wire disconnected?
Two other back to basics thoughts, do you have the correct firing order? Have you checked the plugs? If it has been running really rich, they could be badly fouled and this IS enough to stop it running properly if they are. Ask me how I know - After my episode, my newish plugs were so badly fouled with gas and black deposits from running rich, I couldn't get the strobe to flash! Now that didn't help my diagnosis believe me. That was after I'd just fitted the new dissy. Still wouldn't run when first I first installed it, I thought I'd received a bad one. I fitted new plugs with the new dissy - wham now fires and starts almost immediately now. Still runs a little rich and lumpy from cold for a half minute or so though, I haven't figured that out yet... ANYONE? But once its run for a half minute or so, its fine.
Other thoughts after the above are a compression check for head gasket/valve problems or piston/ring/ring land problems. but thats just probably the next check to make.
Theres other things to check, like making sure the mark on the pulley is actually at TDC when it says it is. Lots of posts on this if you search. Mine was about 3/4 of a degree out, which I consider spot on for a stamped steel cover. I feel like a rambler now, I think I'll leave it at that.
Dave

 

[Trapper]

Re: bad idle until I unplug the 3 bar map

Thanks Dave for the ideas it just gets me brain storming on what to check next, Aaron seems to think it is a bad Dissy, I could check the timing next I know he just de tuned it for shipping so its just something else to look at.

 

[Tooky]

Re: bad idle until I unplug the 3 bar map

I fitted new plugs with the new dissy - wham now fires and starts almost immediately now. Still runs a little rich and lumpy from cold for a half minute or so though, I haven't figured that out yet... ANYONE? But once its run for a half minute or so, its fine.

Hey Dave, I don't wanna get too off topic but, if your truck runs fine 99% of the time and you think everything is solid except those first 30 seconds of cold start, that is something that can be fully adjusted in the chip via the cold start temperature tables. Basically there are tables that go from cold to hot and it's a NEARLY linear line from high to low, meaning the colder it is, the richer it makes the engine. As it warms up, it gets leaner until it reaches the 14.7 magic stoich ratio. But this line is not totally linear - and that is where you could make adjustments. What I'm saying is it might just take a small bump down in the cold section of your cold start temp table, to really solve your truck!

 

[Trapper]

Re: bad idle until I unplug the 3 bar map

Well sent the PCM off, they think it might be that since the PCM is sending no codes and the oil is full of fuel. Could a driver go bad?

 

[Davemc1963]

Re: bad idle until I unplug the 3 bar map

Thanks tooky, I had thought that, but am a little untrained in tuning at the moment. I have however visited your website several times and think you have achieved great things. Thanks for taking the time to document all you have done... I say at the moment, I have purchased a few items, i already had Diacom+, I now have a Mastach ADSL data cable, pocket romulator, pocket programmer and other bits of stuff, I need to buy a Moates G1 or G3. Dont know which to get yet. and then some dutch courage to do something. I was seriously thinking about using one of the 3 bar MAP Bins on your site. I would like to do two things. One is switch the IC pump on earlier (I dont think mine even comes on) and the other is disable the EGR, although I'm not sure of the cons of the EGR delete though.
I too dont want to hijack this post, but really thank you for your advice. However, I dont feel ready for this step yet. Maybe you could do another write up on how to do it (Just kidding!.. no I'm not!) As I haven't a clue. I cant even decipher which is the best software to use. Datamaster, Tunercat?? Is there a guide for which package does what? It seems a bit confusing to me at the moment, but I'm trying to get there albeit slowly. I thought I might need a wideband before I started, but funds will not allow this in the near future. Dave

 

[Davemc1963]

Re: bad idle until I unplug the 3 bar map

Well sent the PCM off, they think it might be that since the PCM is sending no codes and the oil is full of fuel. Could a driver go bad?

Trapper, My oil was full of fuel also, but I thought it was probably due to all the cranking and no starting I was doing before I changed the Dissy. I hope you've nailed it though, the ECU is certainly easier to R & R than the dissy. Dave

 

[Trapper]

Re: bad idle until I unplug the 3 bar map

Trapper, My oil was full of fuel also, but I thought it was probably due to all the cranking and no starting I was doing before I changed the Dissy. I hope you've nailed it though, the ECU is certainly easier to R & R than the dissy. Dave

I wish it was the dissy so I wouldn't have to worry about the ECU taking a dump on me again like this. I hope to find out tomorrow, I was told might get with Erue I hope he does I bought the truck almost 3 weeks ago and it hasen't left the neighborhood yet.

 

[Davemc1963]

Re: bad idle until I unplug the 3 bar map

I bought the truck almost 3 weeks ago and it hasen't left the neighborhood yet.

Trapper, boy does that sound familiar. I was like 9 Months sorting things out and getting it running 'right'. Although that is due to a host of things and being over winter as well.

 

[Trapper]

Re: bad idle until I unplug the 3 bar map

Trapper, boy does that sound familiar. I was like 9 Months sorting things out and getting it running 'right'. Although that is due to a host of things and being over winter as well.

It better not take me 9 months to get this thing on the road. SOmeones buying this thing back if it takes half as long. :rant: