celbii

iTrader: (2)

Hello all,
Today I did a few things, car was running fine before. Now it does not start easily, i can crank it for a while before it would start up, where as before it would go after a few cranks. It is a 88 NA s4 btw.

1) Changed spark plugs, to NGK plugs 7,9 and NGK wires. I am 99.9% sure these are hooked up correctly. Old plugs looked pretty bad.

2) I unplugged the o2 sensor since I was going to change it, but couldnt get it out so I plugged it back in.

3) Installed a bonez intake kit. The maf is not in the stock orientation, as the instructions have me rotate it so the plug is facing up. ALSO I couldn't get the air filter on as its slighty to small, so I dropped the maf a couple of times in the car and it fell about 6 inches 3 or 4 times smacking the car in the engine bay before I took it off and managed to get the filter on.


Could anyone help me figure out what would cause my car to run horrible now and have problems starting up? I didnt take it above first gear since it was bogging/surging/lunging as soon as i tried to give it gas and let out the clutch and drive it. Did I mess up my maf from it being dropped a few times? I know the orientation is wrong, but I don't think that would cause surging, or could it be related to the sparkplug and wire change?

Thanks so much!

satch

iTrader: (1)

The engine can run rather quirky if the AFM is not situated as it was initially installed.

celbii

iTrader: (2)

Yeah I am going to take It back off tomorrow and orient it the correct way to see if that improves anything. I wonder if some sharp drops would be enough to possibly damage it though. I'm sure it could but then it would be hard to buy used ones because I would think they would have a high rate of failure getting shipped to someone...

satch

iTrader: (1)

You can ohm test the unit and compare the numbers to spec as listed in the servive manual and you can check the three pins at the ECU related to the AFM and compare to spec as stated in the service manual and you can jumper the fuel check connector in case the AFM fuel switch has been damaged.

celbii

iTrader: (2)

Update:
1)Rotated Maf, no change. still ran crappy. (It actually ran okay until it warms up then it gets chuggy and lungey)

2) Pulled out the new NGK wires, put the old wires back in. No change, same as above.

3) Reversed the t1 and t2 plugs at the coils(They were labeled t1 and t2 on them, and misplaced t1 on t2, t2 on t1) I noticed before I did the plug change. After doing this, the old plugs hooked up and the trailing plugs swapped at the coil, it is running like it was before I did everything. What would cause it to run correctly with the spark plug wires out of place, and incorrect with them correctly placed?

Thanks.!!

satch

iTrader: (1)

Besides how the wires were oriented at the trailing coil were they connected to the proper plugs at the rotor housings? And you could just unplug the trailing coil as it is not needed for the engine to run smoothly. If it runs well w/o it then focus on the necessary aspects of the trailing coil.

celbii

iTrader: (2)

I'm thinking that the covers on the trailing coils got swapped. Is t1 closer to the driver strut? Because mine has the t2 cover there? And yeah they were plugged in correctly on the housings.

satch

iTrader: (1)

T1 is closer to the front rotor.

celbii

iTrader: (2)

I think that was my problem then. I noticed one of the covers was not on all the way and a wire was sticking out the wrong side. So I'm guessing po took them off and put them on backwards. Would explain why I though the wires were wrong at the coils before. Guess that was my problem then having t1 hooked up to t2 and vice versa. Now they are hooked up correctly and seems normal. Thanks!