Loss of power?

[Suspence]

lol at 2x4 for loading. have to use this as well.

im thinkin fuel... its something stupid. dont change engines. thats retarded.

Haha, yeah I always have to request a flat bed, exhaust was about 1 inch from scraping badly but it still worked just fine. I hope it's something small, I don't want to rebuild any bullshit again.

that is the dumbest statement I have seen posted in quite a while on R3V!
the M20 is a dinosaur, there is nothing to it to even go bad. a valve adj. every 5 years along with a timing belt is by no means high maint.?????

sounds like a bad CPS, I had one do the same thing, I routed it incorrectly and the pulley rubbed through the cable.

hahaha, well I'll let you know what the deal is.

Yeah, if that was my way of fixing problems, I would of replaced my engine 30 times. Do some diagnosing, check the basics. You'll figure it out.

Still want an s50 but I like my m20 for some reason...

Yah. Been saying it to you for a while. Keep dropping money on the M20. If you aren't boosting the M20 I just don't think it is worth the coin. I would swap it now... :)

Now to the problem. Does it feel like it is breaking up? It sounds like spark or fuel. Air should be fine ;) lulz

Coil? CPS? If you hold the gas down does it go eventually? Pull hard for a bit and then break up again?

AH I know, the m20 just kills me as far as money. I don't want to end up with a bad M50 or S50, I know this motor will last just have to keep replacing other components which sucks. I wonder if anyone would want a cammed M20 motor with a rebuilt head?

It feels like it's having a hard time getting power through, pedal to the ground it doesn't really feel right. It will pull hard and then break up a little, and then when the RPM comes down it's really weird... just holds at a certain level and then goes down. Plays tricks on my mind.

Why? M52 + S52 cams. Spend less.

That would be a nice way to go, but I already dropped so much into this M20 I rather just do the few things it needs and then slap a turbo on it. It's boost ready, just keep running into these problems... hopefully it is a fuel pump and nothing too crazy.

this topic has been beat to a pulp.
I've seen M20's last forever with no problems. I've seen them last for about an hour before it overheats.
My friend's M20 started up within .00000000001 seconds after it was sitting in his garage for 6 months. He never did any engine work to it and it worked like a charm (until his CPS started fucking up lulz), I had my M20 head remilled flat, new HG, new hoses, new coolant everything, everything done to spec and the right way. Still overheated.
days upon days upon days of diagnosing. if it wasn't overheating, it had a hard time starting randomly. I could do a HG job in about an hour and a half's time, i knew this motor like the back of my hand, but I just couldn't keep fucking around with it anymore.

So I guess it comes down to the person. I hate the M20 with a firey passion. Someone else might love it. But I know that going 24V and getting rid of the M20 was the best thing I ever did ;)

Damn, well I need to consider an M50 very soon...

[e30nub]

But I know that going 24V and getting rid of the M20 was the best thing I ever did ;)

Didn't you buy your car with 24valve swap done already or did you go S50/S52?

[Brandon12V]

LOL^^^ The epitome of a love/hate relationship with the m20. Looks like the hate won! :p Sounds like you had quite the lemon.

[Suspence]

LOL^^^ The epitome of a love/hate relationship with the m20. Looks like the hate won! :p Sounds like you had quite the lemon.

It's back and forth every day, if anyone has an M50 or S50 please let me know hahahah. Hate going through this crap!!! Just need to commit at one point for more power, and then Turbo the M50.

[Brandon12V]

sell me your miller kit when go m50.

[lolcantturn]

Didn't you buy your car with 24valve swap done already or did you go S50/S52?

I would never buy a built car.

[Sagaris]

I bet a large number of people on the edge of an M20->M50 swap would completely change their mind if they rode in an M20 that was owned by someone that knew what they were doing/had things running properly.

[nando]

it sounds like possibly a bad CPS, main relay, or FP/FP relay

not really a maintenance issue or M20 specific.. whatever it is isn't normal.

[delatlanta1281]

You put a lot of money into it and it's still a terrible unreliable engine to you.

Terribly unreliable b/c something is wrong with it. Fix what is wrong, it won't be unreliable. People who have problems with M20s are either over their heads when it comes to their build, or they don't know enough to troubleshoot the problem properly. They throw part after part at the motor in hopes to fix it...
OP, just do the swap and sell your Miller. Or check your coil, CPS, grounds... Sounds like a spark issue. Take the coil wire off the coil and make sure the connection hasn't melted. I know no one with M20 problems close to me (unless you count a broken timing belt). There's a reason for that ;)

[trackjunkie21]

m20 unreliable? what? Am I on R3V or BF?

[e30shmobberr]

same thing happened to me, major loss of power on my m20, to i said fuck it (it had 308,xxx miles) and i am now swapping to s50

[bmwguy325is]

Id go with dead MAF or a fuel issue as well. I had an early Miller MAF that died. Car didpretty much the same thing you said.

[noE30]

I don't mean to thread jack but my car will have a slight hesitation and then the power will come right back a second or so later, sounds like the same issue just not quite as bad. I've got a hard start issue too, I assume the issues are related.
Either way please post up with what you find out because ill bet its the same issue. Good luck.

[trackjunkie21]

Maybe a vacuum line on the FPR?

[Cabriolet]

doesn't the e30 have a fuel starvation issue in long turns?

replace the CPS its cheap.
and change the fuel pump or run a fuel pressure test and see if you aren't getting enough fuel.

the m20 makes the car epic. the m50/m52 is just too smooth. sure i hate my m20 sometimes but she'll keep up with an s2000.