Not going any higher then 4000 rpms??

[xX-ProudDSM-Xx]

ok so my problem is that my car wont go any higher than 4,000 rpms. Once i try to go higher than 4,000 it starts jerking or studdering. ( a feeling like if you stalled a car) thought it was my Maf sensor because it was kinda broken from the lid so went i got a used working one but still the same thing. on cold starts, i take my car out and it doesnt want to go any higher than 3000 rpms. but instead of the jerking feeling it giives this sound of backfires. it only takes about 2 shift or 3 for the car to start hitting 4,000 rpms again. could the EGR Valve play any role in this?? My car has rough idles sometimes but idk if could be due to the camshafts? i have 1997 Eclipse Gst btw

 

[Bo0sTdTsI]

Check your connectors around your intake pipe I'm not good with names but a cnnector that hooks to the intake pipe was loose on my car a while back and that's what didn't let me get past 3500-4000rpm

 

[GRAVEDIGGER]

How are the plugs and wires? What do the plugs look like? What is their gap? It probably wouldn't be a bad idea to change the plugs and wires if it has been a while, or you're not sure when they were done. Also a boost leak test would be a good thing to do. Good luck.

 

[Abe'sGST]

do a boost leak test sounds like a big leak...what injectors do you have? is your bov cerculated? take some pics of your engine bay, that would help out some

 

[DeviantBoost]

this happened to me once on dsm link, my clutch switch was broke and 4000 rpm was my NLTS setting so my ecu thought I was always on the clutch. Something to look into if you have link i guess

 

[motozachl]

You sir have a boost leak

 

[blazindominic@n]

check the plug to your TPS mine went loose on me during a pull and the car wouldn't rev past 2500-3000 RPMS

 

[xX-ProudDSM-Xx]

i have nrg wires and idk about the plugs. guy that had the car did a tune up which is 4 months ago. i have stock 450cc injectors and i have my bov unrecirculated. i also do have a boost leak between the throttle body and the intake manifold. i also got one on the flange pipe weld.

 

[TheFallenJosh]

My car did the same thing the other day, turns out my BOV had popped out of the intercooler piping.

 

[GRAVEDIGGER]

i also do have a boost leak between the throttle body and the intake manifold. i also got one on the flange pipe weld.

Well, there you go. That would most likely be your problem. I would pull the plugs and take a look at them as well as check the gap to make sure it's at .028". Put in some NGK BPR6ES plugs if they're not already in there.

 

[diamondsm]

did you ever figure out your problem?? i got the same thing going on after rebuilding my engine and im stuck??

 

[xX-ProudDSM-Xx]

nope havent done it yet, ima try too see what i can do and ill let you guys no the result. so yesterday my friend told me to gain speed slowly nd then i went to 4500rpms?

 

[Quietkiller]

do u have a cat on the vehicle ?

 

[rEclipserGST]

nope havent done it yet, ima try too see what i can do and ill let you guys no the result. so yesterday my friend told me to gain speed slowly nd then i went to 4500rpms?

You really have to use proper grammar & English when typing. Have no idea what you are trying to say.

Doesn't matter if you try to go slow or not. Driving it more or less is not going to cure the issue unless you do something about it. Boost leak test. Fix leaks. Progress. I would check your timing, plug gap, and intercooler piping.

 

[jpmxrider489]

It could be a transister pack. Same thing happened to me when I was running on 3 cylinders. And it happens when your bov pops out. As said above check for leaks.

 

[Abe'sGST]

i have nrg wires and idk about the plugs. guy that had the car did a tune up which is 4 months ago. i have stock 450cc injectors and i have my bov unrecirculated. i also do have a boost leak between the throttle body and the intake manifold. i also got one on the flange pipe weld.

ok from this you told me plenty...
1st fix your boost leak
2nd recirculate your bov
3rd check your plugs

 

[xX-ProudDSM-Xx]

checked my spark plug nd they were all burned. weird thing is that it had dry looking beach sand? ima try to see if i can check for boost leaks tomorrow. also both o2 sensors are bad and MAP sensor as well. would this play any part in this problem?