juan Posted November 30, 2008 Share Posted November 30, 2008 I'm having a little bit of hesetation in my 88 mj, it comes and goes ramdomly, the jeep runs with a slight miss / king pull that the engine does. I'm thinking fuel problem but I tested the fuel pressure at the rail and I'm getting a constant 31psi. Is that acceptable? any suggestions? Link to comment Share on other sites More sharing options...
bigd44889 Posted November 30, 2008 Share Posted November 30, 2008 book says 31 psi thats not a guess the book was laying next to me so i looked :rotf: :cheers: Link to comment Share on other sites More sharing options...
bigd44889 Posted November 30, 2008 Share Posted November 30, 2008 try a tuneup Link to comment Share on other sites More sharing options...
BLHTAZ Posted November 30, 2008 Share Posted November 30, 2008 A complete tune up replacing plugs, wires, cap, rotor, air filter, o2 sensor and replace the fuel injectors too. This is probably the best source for injectors...and he gives us a 10% discount when you use ' JEEP ' in the coupon/discount code at check out. Go here... http://www.precisionautoinjectors.com/p ... roductId=7 Link to comment Share on other sites More sharing options...
juan Posted November 30, 2008 Author Share Posted November 30, 2008 thanks guys, keep the sugestion comming, I'm about to go out and double check the ground to the pump which CW tells me is behind the driver side tail light. I'm keeping the fuel gauge with me at all times in case it start acting up again I can quickly test the fuel pressure - I just do not want to change parts w/o knowing if they are bad at all. I did a complete tune up 3 years ago (17K miles ago) and recently (3 weeks ago) replaced the O2 sensor. Do you guys think I should do another tune up? Link to comment Share on other sites More sharing options...
BLHTAZ Posted November 30, 2008 Share Posted November 30, 2008 No...another tune is not likely needed, but check your plugs, cap & rotor for fouling or defect anyway. I still would strong encourage you to replace the fuel injectors though. I am not saying that I believe that they are 100% to blame for your issue, but I can say that they will make a difference in your truck. Mine runs smoother, accelerates better and the MPH went up almost 14% :eek: :yes: Link to comment Share on other sites More sharing options...
Redramman Posted November 30, 2008 Share Posted November 30, 2008 Fuel filter? What brand wires did you use,Ive had trouble with off brand wires.Performance wires like MSD or even ACCEL offer a better spark. Also wire separators to keep wires apart can make big differance.I used to have problems in wet weather but no more. I would also try a good fuel injector cleaner that you pour in your tank. Try differant plugs if that does'nt work then spend money on new injectors. Link to comment Share on other sites More sharing options...
Redramman Posted November 30, 2008 Share Posted November 30, 2008 Have you tried 89 octane gas?? Link to comment Share on other sites More sharing options...
BLHTAZ Posted December 1, 2008 Share Posted December 1, 2008 Injector cleaner in the tank...change plugs... :shake: Now you have wasted at least 15% of the money that could have gone to the new injectors. Check the plugs and if they are bad, change them. Injectors are not expensive and they are the biggest bang for the buck possible. Fuel injector cleaner is a scam and complete waste of money. Link to comment Share on other sites More sharing options...
bigd44889 Posted December 1, 2008 Share Posted December 1, 2008 blhtaz calm down dude i had the same problem all i needed was a tune up him mj hasn't had one in 3 years in needs one weater he puts in injectors or not i do full tune up every year now :cheers: have a beer and relacks Link to comment Share on other sites More sharing options...
FxRacing282 Posted December 1, 2008 Share Posted December 1, 2008 Fuel injector cleaner is a scam and complete waste of money. :agree: Link to comment Share on other sites More sharing options...
juan Posted December 14, 2008 Author Share Posted December 14, 2008 Update - I got around and checked my cap and rotor. Both looked bad. A lot of corrotion, I went ahead and changed them. Next a removed all the plugs and they did not looked to bad - checked the gap and it was ok, right at .35. I ended up replacing them along with the spart plugs and wires and the comanche is running a lot better and the hesetation is gone!!!! Link to comment Share on other sites More sharing options...
juan Posted December 14, 2008 Author Share Posted December 14, 2008 Update - I got around and checked my cap and rotor. Both looked bad. A lot of corrotion, I went ahead and changed them. Next a removed all the plugs and they did not looked to bad - checked the gap and it was ok, right at .35. I ended up replacing them along with the spart plugs and wires and the comanche is running a lot better and the hesetation is gone!!!! Link to comment Share on other sites More sharing options...
mvusse Posted December 14, 2008 Share Posted December 14, 2008 Get rid of that piece of crud Fram oil filter before it damages your engine and replace it with something better. Purolator Pur-One is good, but anything is better than Fram, except possibly the Advance generic one, as I believe it is the same Fram filter. Link to comment Share on other sites More sharing options...
mvusse Posted December 14, 2008 Share Posted December 14, 2008 Get rid of that piece of crud Fram oil filter before it damages your engine and replace it with something better. Purolator Pur-One is good, but anything is better than Fram, except possibly the Advance generic one, as I believe it is the same Fram filter. Link to comment Share on other sites More sharing options...
juan Posted December 14, 2008 Author Share Posted December 14, 2008 I knew someone would say something about the Fram Filter, Iam aware of all the controversy about it, I have been using Fram for over 20 years w/o any issues. I have 2 xj, one with 146K, an the other with 236K, the Mj has 160K and my VW golf has 196 - all use Fram filters. Link to comment Share on other sites More sharing options...
juan Posted December 14, 2008 Author Share Posted December 14, 2008 I knew someone would say something about the Fram Filter, Iam aware of all the controversy about it, I have been using Fram for over 20 years w/o any issues. I have 2 xj, one with 146K, an the other with 236K, the Mj has 160K and my VW golf has 196 - all use Fram filters. Link to comment Share on other sites More sharing options...
CWLONGSHOT Posted December 14, 2008 Share Posted December 14, 2008 I knew someone would say something about the Fram Filter, Iam aware of all the controversy about it, I have been using Fram for over 20 years w/o any issues. I have 2 xj, one with 146K, an the other with 236K, the Mj has 160K and my VW golf has 196 - all use Fram filters. Comanche club members, stay away from Glastonbury Connecticut... when all those filters blow in such close proxcimity.. anyone in that portion of the state could be in jepordy!!! :eek: :rotf: :rotf: :rotf: :shake: :doh: I like WIX.. I have told him so many times.. he won't listen.. BLHTAZ, I have also been harping on him about the injectors too... You know the saying, you can bring a horse to water, but you can't make him drunk.. err :eek: :D I HOPE this fixes it Juan!!! CW Link to comment Share on other sites More sharing options...
CWLONGSHOT Posted December 14, 2008 Share Posted December 14, 2008 I knew someone would say something about the Fram Filter, Iam aware of all the controversy about it, I have been using Fram for over 20 years w/o any issues. I have 2 xj, one with 146K, an the other with 236K, the Mj has 160K and my VW golf has 196 - all use Fram filters. Comanche club members, stay away from Glastonbury Connecticut... when all those filters blow in such close proxcimity.. anyone in that portion of the state could be in jepordy!!! :eek: :rotf: :rotf: :rotf: :shake: :doh: I like WIX.. I have told him so many times.. he won't listen.. BLHTAZ, I have also been harping on him about the injectors too... You know the saying, you can bring a horse to water, but you can't make him drunk.. err :eek: :D I HOPE this fixes it Juan!!! CW Link to comment Share on other sites More sharing options...
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