Car keeps breaking up???

[sick GN]

My car just started to break up while I was driving. Then it fixed for a couple of blocks and now it is back. It seems to get better at higher RPM, but getting up to speed is really bad. What should I check?? I don't have a scan tool but now how to check some things. The car is completely stock except for THDP, K&N, and a chip. I already changed out the chip and it still does the same thing. Sometimes it isn't as bad but it is still there. Any help greatly appreciated.

Thanks
Jeremy

 

[WarpSpeed]

Kinda hard to say for sure, as it could be any one of a number of things. First things that come to mind are Spark plug wires, or Plugs, O2 sensor, weak altenator, and weak fuel pump or some other fuel system problem.

 

[sick GN]

Plugs and wires are new, Fuel Pump is a newer XP, and the alternator is putting out the right amount, So I guess that leaves the O2 sensor!!

 

[WarpSpeed]

Wouldn't be my first guess. How about fuel filter? Does fuel psi go up with boost? Might take a close look at all the vac lines too.

 

[scgnx]

Ignition module/coil..always a likely candidiate. Either swap them out with a known good one or get Casper's tester.

 

[sick GN]

All right I changed the O2 sensor and it still does it, the fuel pressure seems OK, comes right up at start up and holds when I turn the car off. I can't build any boost due to it breaking up so I can't say anything about that. Tomorrow I am swapping the ignition coil/module with a known good one. Also what cars can I get these from??Thanks

 

[steve hughes]

If you can borrow a known good mass air flow sensor try that.

 

[sick GN]

OK I can do that too. My brother has a GN in the driveway right next to mine so I can just swap parts to see what is wrong with mine

 

[sick GN]

OK just swapped the MAF and the ignition module/coil from my brother's car and it still does it!!! Any ideas?? It kinda acts like when an intercooler hose blows off. I checked the hoses and they are OK and I checked for vacuum leaks and couldn't find any!! What should I do??

 

[sick GN]

I tried to read the codes by jumping the A and B spots on the ALDL and the Service engine light won't flash. What does this mean??