m52 power loss at full throttle

[e-dirtym52]

Just ordered new cam and crank sensors and got a whole new set of coil pack boots. These are the last things I can think of to do.

[e-dirtym52]

Put the new tps in and still the same results.

[e-dirtym52]

I'm waiting for my tps to get shipped in. If this doesn't fix it then I'm going to try new can and crank sensors but I'll let you know if it fixes it or not.

[Plynch2]

Im still having the same problem. I unplugged my tps and the problem is less severe but I'm still looking for a fix.

[squidmaster]

just ignition to on should work fine

[e-dirtym52]

My vss is through my c101/x20 because I'm a late model e30 and that's hooked up correct.

Do you need the engine running to test the wot switch or can the car just be on?

[squidmaster]

OBD2 e36 ECUs get VSS (speed sensor) from the cluster for some reason. But I see you have the OB1 m52. I'm not too sure how that wiring is done, you'll have to look into that more, but that could also be your problem.

The TPS can be tested by using a multimeter between the signal (red/white wire usually) and the ground (black). Move the throttle throughout the range while looking at the readings. Should go about between 0 and 5v. If anything is off there, it will throw off the WOT switch in the ECU (anything above 86% throttle usually)

[dirtbag30]

wot is activated by TPS? so its in the sensor. correct me if im wrong? like squidmaster said check the TPS. im not really here for advise since im in the same boat. but together we can figure this out. haha

[e-dirtym52]

Mines not really an rpm kind of issue. Its just mainly wot that's not working. I thought maybe my speed sensor on my diff just shit out.

Which switch is wot? That would just be a new throttle body sensor if it went bad?

And just recently my tach quit working all together but so has my windows, blower motor, and sunroof but I don't think that's related to this issue. That's more of an unloader relay thing

[squidmaster]

Take readings from the TPS. See if the WOT switch is working.

[dirtbag30]

like when you think it should be hitting rev limiter it cuts out, or before?

[e-dirtym52]

Yea that's exactly what's happening. Quarter to half throttle it's fine but if I try to get on it at all it falls completely flat.

[dirtbag30]

not to thread jack here, but i might be having the same problem. does it just straight up cut out at high rpms, or bog down and kindof poop out?

[e-dirtym52]

I've doused it down before with maf cleaner and when I unplug it it will run real bad. The throttle response is also pretty slow as well if that changes anything

[LowR3V'in]

I've had some MAF cars in the past and trying to rev it out but
making 0 power probably means a bad MAF.

I know your car is custom so It can be anything but perhaps clean
it with maf cleaner and see if that helps.