PROBLEMS Runs weak

Started by killinprixs, September 22, 2006, 11:30:09 PM

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killinprixs

This cars got so many problems but im so close.   it hasnt seen the road in 5 years untill yesterday and today.  The motor runs really really weak.  i know it has spark because it arched when i pulled each wire .  i changed the middle coil pack too.  Im going to try to run a paper clip test tomorrow.  The computer screen says check fuel.  Could it be a bad fuel regulator?  sensors?  Clogged cat? Injectors? EGR? ICM?   It takes so long to get up to 40 mph.  Tach reads 1800 at idle and idles bad.    Also, the heads up speedo says around 35 when the dash speedo says around 50....   soo many bugs need to be fixed. 

GangstGP

maybe the gas is bad?

vacuum leaks?

daily driver: 1990 Turbo Grand Prix 180k miles
backup car: 1990 Turbo Grand Prix 118k miles
spare parts: TGP motor and tranny from a red '89

GOT2B GM

CK Fuel means you are low on gas. If you have lots of gas, try reseting your fuel economy and avg speed readouts on your DIC. The dash speedo is a common issue, try to find one on ebay that reads more accurately. What condition is the crossover pipe in, is it original?


Matt Shantz - 1990 Pontiac Turbo Grand Prix COLD A/C 80K mi, KAZ Hot Tuned, Birchtrax'ed +  a few mods  ......... 14.6829 @ 95.11 mph

killinprixs

Yea the crossover is original but isnt leaking.  Im going to get new injectors and test the fuel pressure.  The flash code said code 13 which is O2 sensor and i replaced that today, unhooked the battery , ran it and no more code 13. I also need to replace the egr gasket and the vacuum hose was unhooked.  With new plugs , i got it to idle down to 1500 today which is best its ever run.  Im still positive the injectors are shot....tick tick tick tick.  We'll see what tomorrow brings.            thanks

GangstGP

daily driver: 1990 Turbo Grand Prix 180k miles
backup car: 1990 Turbo Grand Prix 118k miles
spare parts: TGP motor and tranny from a red '89

killinprixs

yea bosch O2.   today im going to test fuel pressure.  t

grinders_18

Everyone else will prolly agree with me, and I can vouch: Bosch O2 sensors are the worst waste of money. I've gone through FOUR (4) of them in the past year before I learned my lesson. Trust me when I say it's worth spending the extra money to get the $60 one from the GM Dealership. AC Delco, I beleive? It's much better, and I have no reason to replace it. Bosch kinda sucks on the O2 sensor side, as far as I'm concerned. My .02

This radio station was renamed Krenzy in honor of the last American hero to whom speed means freedom of the soul. The question is not when he's gonna stop, but who is gonna stop him.

killinprixs

UPDATE>    I finally checked the fuel pressure today and it was around 44 psi which is normal.  I still cant understand how the thing is so slow. I mean slow...  You could pass me in a golf cart slow.  I changed the rest of the coil packs today too.  The car had alot of varnish in the gas tank before i replaced it because the gas was about 4 years old.  Could clogged Injectors and clogged cat make this car run that slow?   Has anyone had a similar problem with injectors?

GangstGP

run some injector cleaner and see if that helps. what wires are you running for spark?
daily driver: 1990 Turbo Grand Prix 180k miles
backup car: 1990 Turbo Grand Prix 118k miles
spare parts: TGP motor and tranny from a red '89

killinprixs

ive got stock wires i think. 

GangstGP

Quote from: grandprixagain on September 24, 2006, 08:20:23 PM
ive got stock wires i think. 
somebody get him part #s for taylor 8mm stainless core.

they are only like $50. I would start there.
daily driver: 1990 Turbo Grand Prix 180k miles
backup car: 1990 Turbo Grand Prix 118k miles
spare parts: TGP motor and tranny from a red '89

Invasion1

Magnecore KV-85 Spark Plug Wires (8.5mm) - 6540

AC Delco Plug wire set - 12073938