1994delsolLS

Ok so nobody ever really answers anything i post but i didnt know what to search for i tried and nothing to my same problem was found. so here it goes it would be great if somone could help. i bought my car back in june of 08 and have had no problems till now it is a 94 del sol with an 0bd1 ls swap and gsr tranny on a p06 ecu 5 speed. Not until recently everymorning when i start the car it doesnt want to start and almost chokes out but once it gets to a steady idle its fine. but once the temp guage gets were its supposed to be the car like hits a wall and seems like its being choked out. when im going from a dead stop driving normal i start 1st gear car doesnt want to move until it gets to 4 grand then you feel the car just all of a sudden pick up same with all gears and i dont know what i need to replace. someone told me sounded like a clogged cat so i put a test pipe on and same thing now people tell me injectors or head gasket what do you guys suggest i do?

slow96lude

try doing a tune up. Like spark plugs wires and cap and rotor. Could be the fuel filter or it may be your chip going out in the ecu. I would start with the tune up tho. Try having the chip reburnt or running your ecu in a buddies car

1994delsolLS

well i know its not the ecu cuzz its not chipped and i put a p30 and a p28 in with no difference except throwing a code but i have a fuel filter i will try to do that now and the car had a full tune up less then 3000 miles ago plugs wires oil oil filter/air filter so i have a msd cap and rotor for when i install my 6al with an external coil will the cap with the external coil tower still work without the external coil?

Former User

What CEL code(s) is being thrown?

Have you tried unplugging the O2 sensor or ECT sensor to see if the problem is eliminated.

Is the ignition timing set to spec?

slow96lude

no you will have to use the external coil because the cap wont connect to the one inside the dizzy. I had a ls with the same problem and it was the cap and button. The contacts inside had worn down so much the the spark was jumping to the points and droppin the spark

1994delsolLS

the ignition has never been removed from the motor not sure of the code im pretty sure it just isnt picking up the sensor for vtec i could be wrong though no i never unplugged the 02 sensor could it reall cause this? i have a 4-1 header so i bought the blox cel eliminator wich spaced the 02 sensor from the increased air flow but ive had the problem before the install of the header and test pipe

slow96lude

a faulty o2 sensor will definatly cause this. o2 sensors do weird things to engines

Former User

Pull the codes.

As the problem only occurs when the engine is hot, it could be a faulty ECT or O2 sensor. It's pretty easy to unplug each one at a time to see if the problem goes away. Also check the ignition timing with a timing gun and the service connector jumped.

1994delsolLS

no it only throws a code when i have the p28 or p30 in it doesnt throw a code when the p06 is in wich is what i normally run

1994delsolLS

Well I changed the fuel filter and I put the engine ground in the right spot bu still has the Same problem so idk what it is now car still does the same thing I took the distributor cap off but it looked fine any other suggestions? I will look at the 02 sensor next

1994delsolLS

anyone?

slow96lude

well the CEL is prbly cuz of the eld or something stupid with the ecus. My suggestion is start with the dizzy or maybe just do a leakdown and compression test and see if its internal and nothing to do with fuel. But to me it seems to be something with spark or fuel

1994delsolLS

ok so i have changed the fuel filter and distributor cap i couldnt get the rotor screw off but the rotor looks fine. i have talked to a few people who still lean towards the head gasket problem and say that if it was the oxygen sensor it would be throwing a code. but i must say recently every so often i will be driving along annoyed with the hesitation and the cel will come on but then go off and not come back on for days

1994delsolLS

Should i just go ahead and do the headgasket and if so what should i get with it ?

1994delsolLS

what is an ECT not farmiliar with that term

primednreddy

i had a similar prob with my car... i replaced everything i could think of: plugs, wires, cap and rotor, o2 sensor, fuel filter, and tps. Finally i found that the map sensor was the culprit... that air gas mixture is crazy. My car would bog down until about 4200 rpm and then be fine. Just thought i'd put in my experience

Former User

The 2-wire ECT sensor (or TW sensor) located below the distributor reads the coolant temperature and sends the information to the ECU.

1994delsolLS

gotcha how would that make the car act the way it is though? im down to try anything at this point

1994delsolLS

4200 thats like the exact spot mine kicks back to normal

Former User

Glad to hear my suggestions are only considered when you become desperate.

Information from the ECT sensor is one of multiple different inputs that the ECU uses to determine the optimal air/fuel ratio. Thus, an incorrect ECT signal might cause the engine to run poorly. The same can be said for the primary O2 sensor.

Have you tried to pull CEL codes from the ECU?

1994delsolLS

the CEL is not on it only comes on sometimes in 5th gear then goes away

Former User

Jump the service connector to see whether the ECU has any stored codes. It's so easy. That CEL likely holds the answer to this problem.

1994delsolLS

that means i would have to do this while driving and the code doesnt always come on and it goes away min's after it comes on what do you think about the map sensor like the other guy was saying?

Former User

Have you tried to jump the service connector to see if a code is stored?

Have you tried to disconnect the O2 and ECT sensors?

1994delsolLS

no i dont know were the service connector is and if i disconnected them how would i tell anything?