PePe240sx

The other day as I was driving back from work, my car hesitated and jerked violently while on the highway. It's the feeling where you are almost out of fuel but in my case I still had a half tank of fuel remaining. Well to make things short, it started to die and I had to pull to the side of the road as it went. It starts up and stays running at idle but when I put it in gear and try to drive it, it immediately dies afterward.

It's a bone stock D15Z1 with 241,5xx miles on it, and I just replaced the fuel filter this morning to see if it was the issue. That one had 106k miles on it so I figured it was a clogged fuel filter giving me the issue, plus it was long overdue so why not? Start it up, try to drive it, same problem.

Does this sound like a fuel pump issue? Main relay? I'm kind of stumped.

grumblemarc

iTrader: (4)

CELs?

PePe240sx

None pop up while driving.

Crashtestdummy

Mine was doing that and it was the fuel pump. It would run fine at idle but as soon as i give it gas it would drop, if you have a fuel pressure gauge it should be pretty easy to see if thats whats causing it.

Linked

can it rev pretty high in neutral without dieing out?

PePe240sx

Haven't tried it, I'll do that and see if it does without dying.

PePe240sx

So it does die when I try to rev it high while in neutral

Linked

then it could possibly be your fuel pump or probably tps sensor

PePe240sx

Gotcha, so is a 190lph Walbro fuel pump excessive for the D15z1? It's much cheaper than OEM and lots of people use it so I'm leaning heavily towards it. What do you guys think?

PePe240sx

Got the fuel pressure tested out, here's the reading:



Is that a lower reading or no?

Crashtestdummy

Thats close to what mine runs with a new pump on it. Mine was sporadic tho so even with the bad pump it would sometime still have that much pressure.

SnoFox4

If you turn the key on/off a few times do the readings stay the same?

Crashtestdummy

Yeah it stays the same for a little while than it slowly drops, a little faster to drop when its cold. I'm willing to bet you that the fuel pump should be the culprit. Unless you have trash or rust in your tank, or the strainer bag is clogged. It won't take long to swap the pump, the hardest part for me was getting the stupid clamps off the tube connected to the pump.

PePe240sx

I checked out the plugs last weekend and they were pretty foul, so I replaced the plugs with new NTK ones and the wires too, and the car ran much better.

Until earlier tonight, when the same symptoms erupted. This time, a CEL light came on so I jumped the port to see what the code was. Turned out to be a 48, for LAF sensor. I figured it was time since the last time I replaced it was nearly 5 years with a used one that had 50k on it. I had a feeling it may have been either that or a broken motor mount since I felt a bit of jerking and what felt like fuel cutting in and out at 4th and 5th gear, before it shut off while driving on the highway. Scary stuff.

slowcivic2k

EGR does weird things to any car, would probably be worth the time to clean the EGR system as well with as many miles on it as there are.

PePe240sx

EGR was replaced at 157k, it's got 242k so definitely not the problem in this case.

articsilber323

try unplugging the egr plug at the intake manifold it wont throw a check engine light and drive it and see if it still does it

slowcivic2k

I'm not talking the valve, I'm talking the passages in the intake manifold, very common for those passages to clog up with carbon on just about any car.

stuckoncivic99

I am having a sort of similar problem but mine revs great and idles fine as soon as i put the car in gear and release the clutch the car jerks violently and wants to die unless i keep reving the motor. I bought the car from someone that installed the motor in the bay but simply couldnt figure hat came next i plugged the harness rite up and started up sounds great in comparison to some swaps ive started up. Im lot im kinda questioning the clutch assmbly pls help me. no CEL