I always start with cap, rotor, plugs and wires.
stutters & won't pull
Thread Starter
Drifting
Joined: May 2011
Posts: 1,542
Likes: 54
stutters & won't pull
symptoms = idles fine in park but under load & wot it stutters and doesn't pull until about 3000 rpm. Fuel economy has dropped by half. no codes etc
fuel pressure @ 36-40 during idle and it holds after shutdown. going to replace the fuel filter tonight although I don't think it is a filter issue due to good pressure during idle. I suspect ignition bc of previous problems with spark plug wires.
any suggestions on what I should check would be appreciated
stock 1989 Auto
fuel pressure @ 36-40 during idle and it holds after shutdown. going to replace the fuel filter tonight although I don't think it is a filter issue due to good pressure during idle. I suspect ignition bc of previous problems with spark plug wires.
any suggestions on what I should check would be appreciated
stock 1989 Auto
Thread Starter
Drifting
Joined: May 2011
Posts: 1,542
Likes: 54
Burning Brakes
Joined: Mar 2010
Posts: 1,094
Likes: 68
From: Providence RI
Any way I can help? Did you ohm out the injectors?
I would also check out the TPS too. Did you ever get datamaster to read/operate correctly?
This would show you if theres a flat/broken range for the tps.
Let me know if I can help.
Mike
I would also check out the TPS too. Did you ever get datamaster to read/operate correctly?
This would show you if theres a flat/broken range for the tps.
Let me know if I can help.
Mike
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Thread Starter
Drifting
Joined: May 2011
Posts: 1,542
Likes: 54
I haven't been able to get my laptop to datalog. I recently ohmed out the injectors cold they were all 16.4 and hot they were #1=17.2 , #2 thru # 6=16.9 #7=17.1 #8 17.3.. I'll recheck them and the TPS when I get home tonight. If fuel related I just don't understand why fuel economy has suffered so much.
Burning Brakes
Joined: Mar 2010
Posts: 1,094
Likes: 68
From: Providence RI
I'm pretty busy this weekend but i'm open monday after like 2 if you want me to take a ride up with my laptop/cable/etc and anything else that may help and we can give it a go...
I'll bring my vette so we can steal parts to see if it helps.
Mike
I'll bring my vette so we can steal parts to see if it helps.
Mike
Thread Starter
Drifting
Joined: May 2011
Posts: 1,542
Likes: 54
Thread Starter
Drifting
Joined: May 2011
Posts: 1,542
Likes: 54
I replaced the fuel filter, fp,sock, rotor & gapped the plugs. Plugs #4&6 appeared hot. Run much better now. Seems to hang in 2nd gear way to long but friend recommended I changed tranny fluid. Couldn't check exhaust because I can't get a gauge on the o2 sensor or air pipes ( I don't have the right fittings). I am still concerned about the drop in fuel economy.
Last edited by gunnerjuju; Oct 7, 2012 at 10:31 AM.
