modimport

I was wondering if any one could tell me why my car wants to skip under hard acceleration at around 5-7k rpm. Any help is appreciated.

hotrodrx7

Check your plug and wires. Have you done any mods recently?

modimport

I just baught the car recently and the guy told me that it has a high volume fuel pump in it. Other mods are not motor related. It does seem to be missing something on the passenger side of the motor though. There is a bracket with nothing on it and the air box has a missing hose.

modimport

actually its missing 3 hoses.

rynberg

1. Don't drive the car hard anymore until you become more familiar with these cars and what has been done to yours.

2. Take some good pictures of the engine bay and underneath if possible. Post them up and let's see how stock your car really is.

3. What are the maintenance records? How many miles are on the car/engine? Are you close to these guys? http://www.rotorsportsracing.com/com...fo/default.htm

4. Go to your regional forum and find some knowledgable FD owners in your area to check out your car.

5. Get a factory service manual (FSM). Read the links in the FAQ.

potatochobit

iTrader: (1)

what do u mean skiP? you have ignition break up or your car is sliding around or you are getting wheel hop?

technonovice

It sounds like it could be ignition break up. I had some break up in upper rpms and changing the plugs & wires cured it. I also noticed my igntion harness was crispy and the insulation was flaking off. I replaced it at the same time, but that could have been a culprit.

POS7

It shouldn't be missing 3 hoses. Theres a port on the IC side of the stock airbox that shouldn't be connected to anything. If the stock (or aftermarket) bov is venting to atmosphere, that's a 2nd hose missing. So at most, there should be 2 hoses missing, not 3.

Pics are helpful

RX7Wishing

i had a similar prob to yours.... my prob? a check valve was backwards.

kashent

Missing hoses, empty bracket == sounds like airpump was removed.

schwass

hey man. if your sayin that your engine feels like it is missing or popping under load between 5 and 7k???? i had this just recently and so did one of my mates. i researched this site and tracked it down to being blocked injectors. i had replaced the plugs and the leads but nothing, was going to do coils next. but all i did was put in twice the ammount of injector cleaner recomended into half a tank of gas and then drive the car in second gear at about 80km for bout half an hour cos under normal driving conditions the secondary injectors are not open. so there for they do not get cleaned. correct me if im wrong. now my car is boosting hard. (i own a 99 fd3s pretty much standard but am working on that ) once i had fixed the prob on my car my mate did the same and sent me a txt 2day saying thanks the he is now launching hard again. is worth a try cheeper than plugs n leads.
thanks mark

`sl!mXP

first get some more info, what mods are done, what kind of engine, when were the perishables replaced? Also by skip what do you mean? Is wot accel "chunky" as opposed to a smooth and full accel to redline? If so check your plugs, if that doesnt work it might be your injectors. To further diagnose anything you need to get a mods list and a better description of the problem.

If you are close to rotorsports give them a call, they were the ones that rebuilt and ported my engine and have been pretty helpful. But from talking to them the other day it sounds like they are pretty busy, so if its something simple like plugs you might as well just do it yourself.

technonovice

Where are you in NC? I'm in Raleigh and will be at NC Speedway in Rockingham this weekend. Maybe we can meet for a quick look at it.

MazdaSpeed93

I have engine break up on my car too, i changed to NGK plugs and wires but that didn't cure anything so i'm thinking you need to get a different ignition set up, thats what i am going to do on mine.

alberto_mg

it's always best to take the car to a good rotary specialist if you have any doubts and are just getting into the game. otherwise you waste a lot of money on parts that you think might or might work but don't have the experience to be sure. or you blow an engine b/c you bought a car that wasn't properly modded to begin with.

Kento

Let's just hope it's not fuel cut you're hitting for whatever reason...

You'd best find out for certain how stock your car really is.