Help if you can. Car barely even starts on MSPNP2
08-13-2021, 06:55 AM
#1
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Help if you can. Car barely even starts on MSPNP2
I have a 95 with a 97 motor (blew up the 95 engine and the 97 was close enough lmao) but I switched to megasquirt to tune for NA before I start doing any crazy mods like injectors or turbo. I’m running stock everything. No wideband yet. No iat sensor yet. (Haven’t had time to throw them at the car yet and also could be contributing to my issue) but I hooked everything up. (Made sure my ecu was 9495 btw) and threw on the correct base map. After attempting to verify base timing. (Trigger angle offset was super odd and is most likely wrong as hell) but none the less I got it to 10 degrees and tried to start it. It “started” after backfiring and feeling like the engine was actually doing circles haha. But it started and ran. Awfully but it did it. Tapped the gas and it almost killled the car. But slightly pressing into the gas it revs fine. I figured well it works. So I drove it barely ever got past 10% tps. Never even thought about driving it hard. Literally just grannied through my neighborhood and honestly. It drove fine (as fine as an untuned car can) but it honestly wasn’t bad. However idle, quick throttle input, and definitely starting the car feel like it’s running on 2 cylinders. Anyone have any ideas? EDIT. The car runs extremely well on the stock 95 ecu. It runs literally perfect on the stock ecu even with the base timing being at like 14 degrees haha
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08-13-2021, 09:56 AM
#2
Cpt. Slow
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lmao it's the same engine haha.
Post your tune and a log. But without a wideband, you're completely blind as to what it's doing. Chances are without a IAT it's defaulting to a temperature that's also giving you issues. But if you have the MAF plugged in, you're using that sensor. Use a long 1/4 extension or something else to physically verify TDC on #1 cylinder, make sure your pulley is actually pointing to 0. ECU is in a terrible location for a MAP line, are you sure it's free of any kinks or obstructions from the engine bay to the ECU?
Post your tune and a log. But without a wideband, you're completely blind as to what it's doing. Chances are without a IAT it's defaulting to a temperature that's also giving you issues. But if you have the MAF plugged in, you're using that sensor. Use a long 1/4 extension or something else to physically verify TDC on #1 cylinder, make sure your pulley is actually pointing to 0. ECU is in a terrible location for a MAP line, are you sure it's free of any kinks or obstructions from the engine bay to the ECU?
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08-20-2021, 07:41 AM
#3
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lmao it's the same engine haha.
Post your tune and a log. But without a wideband, you're completely blind as to what it's doing. Chances are without a IAT it's defaulting to a temperature that's also giving you issues. But if you have the MAF plugged in, you're using that sensor. Use a long 1/4 extension or something else to physically verify TDC on #1 cylinder, make sure your pulley is actually pointing to 0. ECU is in a terrible location for a MAP line, are you sure it's free of any kinks or obstructions from the engine bay to the ECU?
Post your tune and a log. But without a wideband, you're completely blind as to what it's doing. Chances are without a IAT it's defaulting to a temperature that's also giving you issues. But if you have the MAF plugged in, you're using that sensor. Use a long 1/4 extension or something else to physically verify TDC on #1 cylinder, make sure your pulley is actually pointing to 0. ECU is in a terrible location for a MAP line, are you sure it's free of any kinks or obstructions from the engine bay to the ECU?
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12-05-2021, 11:39 PM
#4
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Location: Kootenai county Idaho
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Had a similar issue with my 94 mspnp2, you can leave the MAF vane in place and jump the wires specified in the install guide. Set timing with a light on stock ECU @10 advance and then set 17-20 advance on fixed timing in TunerStudio ms lite. Will idle around 500-600, haven't solved this yet(also starts kinda rough). You must have the wideband installed for the next step(I have an AEM 03-0300. The car will run lean @28-39 kPa fuel load at 2200 above sea level. Go to the fuel EV map and adjust UP the values by 5 or so. My car runs a little rich right now but as long as its not lean(showing 17+ on the wideband). Do this with 2 people and have them drive so you can watch the gauges and edit the map on the fly(UP is good). If you wire the wideband into the ECU it will use the AFR table to keep itself in check(haven't got there yet).
Last edited by Dantibus1; 12-05-2021 at 11:40 PM. Reason: grammer mistake
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12-07-2021, 01:57 PM
#5
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Location: Athens, GA
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I'm not sure if it matters that much but I was reading through the setup guide today in preparation for putting in my MS, and in all caps it says the car must be running 93 octane, or whatever the highest available to you is. The basemaps are calibrated to run on 93, but again I have no idea if this is contributing to your issues or not
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