Tungsten Posted August 15, 2009 Share Posted August 15, 2009 Ok recently like about a week ago I got this weird intermittent starting problem... Sometimes when I start the truck it sounds like its about to fail and chokes on itself like its about to stall. Then it gets going again like there was no problem! Anything familiar or is this something new? Link to comment Share on other sites More sharing options...
frecklecolouredbrain Posted August 15, 2009 Share Posted August 15, 2009 could be your fuel pressure. turn your key on and wait about ten seconds before you start the engine. if the choking doesn't happen, you need a new fuel filter. i had a similar problem when i bought my 89 last year. Link to comment Share on other sites More sharing options...
Precise1 Posted August 15, 2009 Share Posted August 15, 2009 It might also be your control system 'adjusting' its self when it first starts up. Sometimes mine will stumble and stutter for a few seconds then the idle will jump up and it runs perfectly. I ignore it... B Link to comment Share on other sites More sharing options...
Jeenyus Posted August 15, 2009 Share Posted August 15, 2009 id say i had a similar problem, changed tons of things, nothing worked..and then i changed out my distributor and cap and bammo, worked good...get a timing light..check see if all cylinders are firing.. but i also suggest just checking your distributor cap, wires and plugs Link to comment Share on other sites More sharing options...
Tungsten Posted August 16, 2009 Author Share Posted August 16, 2009 Ok well I already have a recent fuel filter, less than 5000 miles on it The distributor doesn't look bad either Can the "OBD I" tell me if I have a misfire? I cleaned the carbon buildup in the throttle body today, maybe this will help Link to comment Share on other sites More sharing options...
BowTied Posted August 16, 2009 Share Posted August 16, 2009 Turn the key off then on at least twice without starting, then start. Do this for a couple of days at least. If no issue starting, then it could be fuel pump/regulator not building quite enough pressure... Link to comment Share on other sites More sharing options...
Tungsten Posted August 16, 2009 Author Share Posted August 16, 2009 (edited) Maybe the fuel tank has a leak? I have a new fuel pump and sender. Maybe I turn the key way too fast? How long should I keep the pump running before I crank it? Edited August 16, 2009 by Tungsten Link to comment Share on other sites More sharing options...
Kittamaru Posted August 16, 2009 Share Posted August 16, 2009 I know in my '90, I don't have to wait at all - I go straight from off to running, first or second crank, every time. Only time it doesn't is if it's been running and fully warmed up, then shut off for a few moments (say, a minute or two) - it acts like it doesn't want to start for two or three cranks, then kicks to life. Only other time is when it's SUPER cold, but that's for obvious reasons Link to comment Share on other sites More sharing options...
Formerly_94PathyMan Posted August 17, 2009 Share Posted August 17, 2009 mine does that every once in a while too. Does yours smoke some rich @$$ smoke when it happens also? Mine does that, but it hasn't done it now for quite some time. Link to comment Share on other sites More sharing options...
westslope Posted August 17, 2009 Share Posted August 17, 2009 .....I cleaned the carbon buildup in the throttle body today, maybe this will help Well? Did it help? I find that when the air intake throttle body gets dirty, the rpms will randomnly drop when the engine is warm and idling. After a cold start, it seems the richer fuel mixture takes over and keeps rpms high. Translation: I strongly doubt that a gummy air intake throttle body is responsible the intermittent starting problem when the engine is cold. Link to comment Share on other sites More sharing options...
Indigent Posted August 17, 2009 Share Posted August 17, 2009 Could be a sticky fuel injector. Link to comment Share on other sites More sharing options...
Formerly_94PathyMan Posted August 18, 2009 Share Posted August 18, 2009 (edited) Well? Did it help? I find that when the air intake throttle body gets dirty, the rpms will randomnly drop when the engine is warm and idling. After a cold start, it seems the richer fuel mixture takes over and keeps rpms high. Translation: I strongly doubt that a gummy air intake throttle body is responsible the intermittent starting problem when the engine is cold. I second that, cuz mine is a 94 with EFI not TBI, and it does it from time to time, and it isn't the fuel filter, I have replaced that lots of times, it doesn't help. Only thing I have found that makes it quit for a while is using 87 gas or BG 44K every three months for 3 or 4 oil changes. Then I don't get it at all. Maybe mine is an oil burnoff problem, I got 220k on it. I got it with 160k and it has done it since I got it. It seems to get better in warm weather though. Haven't checked out my injectors though, probably why 44k helps. Edited August 18, 2009 by 94Pathyman Link to comment Share on other sites More sharing options...
Tungsten Posted August 18, 2009 Author Share Posted August 18, 2009 Well its not doing that anymore... I don't know what happened but the problem is gone. Link to comment Share on other sites More sharing options...
westslope Posted August 19, 2009 Share Posted August 19, 2009 Tentative translation: You cleaned in the air intake throttle body and noticed no difference. Then sometime later the problem suddenly disappeared for no apparent reason. Have I got that right? Happens to the best of us. Link to comment Share on other sites More sharing options...
Tungsten Posted August 19, 2009 Author Share Posted August 19, 2009 (edited) 94pathyman and Precise1 got it right its definately a buildup/burnup problem in some cases i use 93 octane gas so that could have been the engine adjusting too maybe use a lower octane? cleaning the intake did help with the power curve and made the idle much smoother also i had to lower the throttle cable to drop the idle back to 800 as my idle increased by 200 rpm Edited August 19, 2009 by Tungsten Link to comment Share on other sites More sharing options...
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