Thread: HELP flashing check engine light/ poor acceleration

I was just driving down the road after getting a car wash and all of a sudden my 2000 gtps idle changed and it sounded like it was running on less pistons and the service engine light started blinking. My Acceleration is poor but i can still get it up to speed. Im thinking skipped timing or plugs or something idk please any input would be great this is my daily driver and i need to get to work tomarrow.

Flashing light means misfire.
Have you had the service light scanned yet?

btw i just changed my plugs and wires about a month or two ago also changed fuel filter and fuel pump a few weeks ago

Originally Posted by Bluemagic

Flashing light means misfire.
Have you had the service light scanned yet?

it just happened and nowhere is open to scan it

Do you know anyone with a scanner by chance?

Well the scan would help tremendously.
Otherwise you can check to see if any wires are melted, check all wire connections and also check your coil packs for corrosion.

al 606s gapped at .055

ok well can this be caused by anything major like intake manifold gasket or something huge that will cost me a fortune

Originally Posted by ginseng

ok well can this be caused by anything major like intake manifold gasket or something huge that will cost me a fortune

Seems unlikely but you never know until
It's scanned and you check the codes. I wouldnt worry about it too much. Rest easy, check it in the am and go from
There.

Originally Posted by BillBoost37

Right..let's skip all the easy things and go right for new engine. Since you're the one footing the bill...it sounds good.


Technically, it means "Catalyst damanging condition" Which..is usually caused by a misfire.

well i know my cat was going i could hear it while driving real shaky is it a possiblity its just clogged, i pulled all the wires off the coils and they all spark and the misfire im getting is 305

hey bill no need to be rude ive put 1500 worth of parts in the car in the last 3 months, and ya the cat was next on my list just ran out of money. Im not coming here for a lecture im coming here for probable answers on what could cause a misfire and im surprised usually you give the best answers bill and i was hoping you would come into this post and help me out but know youve shown me a different side of you, changed my mind. Anyway no drama i just was technical answers thanks

Well, since P0305 is a code for misfire on Cyl #5, start there. Check the wires for obvious damage. Since this happened after getting a car wash, is it possible that you got some water somewhere it shouldn't have? If the wire looks good then try swapping it with a good wire and see if the miss follows.

ok well lets see what been done

Sway bar
Struts
rotors
breaks
plugs (al 606s
wires
all fluids (inc sc oil)
thermostat 195
Tires/ alignment
Fuel filter
fuel pump
headlights
oil pan
break lines
exaust welded (small leak)
Gas line
Throttle body gasket (cleaned tb)
Egr hose/ egr valve
CAI

Think thats all i can think of atm

ok well i guess my next question should be, im going to replace the cat i see one on zz performance for 79 what is the stock size i need and can these things clamp on or do i need it welded
ZZPerformance - Catalytic Converters #ZZ-CATC