maccakpa Posted August 3, 2022 Report Share Posted August 3, 2022 Hello guys! Need some help on cold start and idle Last few months Im keep trying to figure out smooth idle and correct idle. Since i have like no pro tuner in my country. Car drives okey in cruise and couple of WOT. The problems are: 1. On cold start car doesnt hold its rpm and shuts down 2. Cranking time is longer (about 3 secs or more) 3 Idle is unstable rpm rises and falls almost constantly. Mods are: -IAG900 longblock -Kelford 282 cams with 1mm oversized valve (with all supporting mods and ported) -Precision gen 2 6266 v band 0.82 hotside turbo - 38mm tial WG - 45mm TIAL BOV - ID1050x top feed injectors (have id1700x since im not sure fuel pump could hangle it) - Aeromotive A1000 FPR - 340lph fuel pump - 10 bar fuel pressure gauge (Calibrated) - 5.2 bar map sensor (Calibrated) - GM IAT sensor - MAC 3 port boost solenoid - AEM water/meth injection if anyone could help me with happy idle i would be so happy https://drive.google.com/drive/folders/1kCOBWtsmGkheDbQia-t6jeAFpD4GvWR4?usp=sharing Quote Link to comment Share on other sites More sharing options...
remski2 Posted August 3, 2022 Report Share Posted August 3, 2022 I have 272 GSC cams and I idle at 1100.. so bump your idle speed. I'd copy the E-throttle PID settings from the base map. Copy your Idle ignition control PID settings from the base map as well. See where that gets you... If that doesnt work switch to Open loop idle control and go from there. Hope this helps. maccakpa 1 Quote Link to comment Share on other sites More sharing options...
Adamw Posted August 3, 2022 Report Share Posted August 3, 2022 Yeah, that map looks terrible. Below I have attached your map with some changes to make a better starting point. Will need to see another log with this map to see how base position looks. Starting point.pclx maccakpa 1 Quote Link to comment Share on other sites More sharing options...
maccakpa Posted August 4, 2022 Author Report Share Posted August 4, 2022 thank you for your support ! i uploaded map and now idle is smooth . here is the log https://drive.google.com/drive/folders/1q3Gc6elVBxZp11lIBIFbOdjh3KS5vixD?usp=sharing Quote Link to comment Share on other sites More sharing options...
maccakpa Posted August 4, 2022 Author Report Share Posted August 4, 2022 I did couple pulls on 3rd gear and cruise logs added to google drive as well Quote Link to comment Share on other sites More sharing options...
remski2 Posted August 4, 2022 Report Share Posted August 4, 2022 You hitting an ignition cut mid of your pull... You are close to MAP limit but it doesnt show it triggered.. 2nd thing.. your knock.. 3rd.. you have warm up enrichment on while at normal operating temps.. add that to fuel and zero out your operating range. Unless there is another reason to have it on... my2c. maccakpa 1 Quote Link to comment Share on other sites More sharing options...
maccakpa Posted August 8, 2022 Author Report Share Posted August 8, 2022 thank you sir! and i still have a problem. 1. Cold start its still little bit of slow start. 2. when i let off the throttle car shuts down in a cruise range and after WOT 3. when i tried to park (turning steering wheel) car shuts down either. what should i do? I zeroed warmup enrichment 80-110ECT to all "0" Quote Link to comment Share on other sites More sharing options...
maccakpa Posted August 10, 2022 Author Report Share Posted August 10, 2022 hello again. solved car idle control and car shuts down in traffic issue. today i made 3th and 4th gear pull using 95 octane fuel +50/50 water methanol injection. While run there is huge knock accurs on cylender 2. is there anyway to solve this issue?/there is something with heads slapping that area since after i got my iag900 blongblock heard with headseat im sure it was not piston slap/ please see attached file and log. 3rd and 4th gear log with file Quote Link to comment Share on other sites More sharing options...
remski2 Posted August 10, 2022 Report Share Posted August 10, 2022 Hi. Your knock needs to be tuned first.. to see if this was real knock. I wouldnt be going around and doing pulls on untuned knock/ignition. This is a recipe for a new iag900 block. Either take it to a tuner or take some courses. Also if you fixed your idle.. post what fixed it.. it might help another guy.. to reduce knock you'd usually remove timing or add fuel or both.. or look at you AVCS. Remski Also.. you went from 6500 to 7700 so either you have trigger issues or your clutch slipped. maccakpa 1 Quote Link to comment Share on other sites More sharing options...
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