Engine stutters when accelerator pressed.

[petec]

I just looked at a 93 5spd with 93k. It hasn't been run for months, but, it seemed to start/run fine. It pulls strongly and smoothly. The only problem is that it kinda stumbles at the moment the accelerator is pressed. Once it gets reving it is fine.

I am wondering if sitting for a long time, it hasn't been registered for 2 years could be the problem. Maybe a simple tune-up and fresh gas will take care?

The car has a light hit front left, scratches rear left, but other wise seems fine. Handling/braking seem unaffected. He is asking a grand or b.o. . Sounds like a pretty good deal to me. It has had a recent clutch replacement.

<small>[ June 14, 2002, 11:24 AM: Message edited by: petec ]</small>

 

[BeatDaSHO]

might be oil in the plug wells.......pull off the spark plug boot and look inside. there might be oil in there and if there is, this will cause misfires or stumbles. you would need to replace the valve cover gaskets and plug well gaskets and that is all found in the felpro gasket set. it also might just need to be run since it hasn't been running for a while. maybe change of spark plugs also. the SHO motor NEEDS the motorcraft agsp32pp plugs. A grand is a great price. go for it man and better yet, work him down even lower.

Greg

 

[jthomas68]

Actually,you do not need the Motorcraft plugs.They just work well,and have the best fit.Fwiw,i have been running el cheapo Champion copper plugs with the common problem of being too tall.I have had ZERO problems with them,and they are 2 ranges colder than stock.

 

[jcostantino]

But you are running nitrous so you would want colder plugs, no?

You can put any plug in that fits and doesn't go too deep into the combustion chamber. Same goes for the height... you can put any height plug in but then you'll want to worry about the top of the boots not sealing and water getting in.

Fortunatly there really is only two height plugs and the difference is about 1/16". If your car starts to run rough, check for water in the plug wells.

Jeff

 

[jthomas68]

Yes i do need the copper,but i was more trying to stress(not very well)that they are the taller ones.The boots don`t seal and yet i`ve experienced no problems with them.I`ve never actually even heard of anyone who has had issues involving the taller plugs,i think it`s just an old SHOwives tale that the boots MUST seal in order to no have problems.

<small>[ June 14, 2002, 04:47 PM: Message edited by: jthomas68 ]</small>

 

[BeatDaSHO]

old wives tale eh?........better knock on wood now buddy. i was trying to stress that the motorcraft plugs are the ONLY ones that will last 60,000 miles without need of replacement and will actually seat correctly and make the best contact. Others can foul out in less than 10,000 miles. If these plugs that are in this car are not the motorcraft ones, then there is a good chance that they are fouled out by now. Why would u go and put some crappy plugs in that aren't even going to last?? That's why i was saying that he should get the motorcraft ones.

Greg

 

[jthomas68]

Here`s why,i have nitrous on the SHO,so i CAN NOT use the stock Motorcraft plugs.The Motorcraft ones do work the best,obviously because they are OEM fittment.But,to suggest that no other plug will work is rediculous.If someone is only going to change their plugs every 60,000 miles,then they deserve to have problems.For $6 worth of plugs,why leave them in for 6(or in my case 12)years.Since when is Motorcraft A1 quality anyways?Like i said,Motorcraft will have the best fittment,but is by no means the only decent choice,there are options.

 

[BeatDaSHO]

I never said YOU had to use the motorcraft ones. I was talking about Petec. You use the nitrous so you are in a totally different ball field. But, whatever you say buddy.

Greg

 

[BeatDaSHO]

With this statement that i said......"Why would u go and put some crappy plugs in that aren't even going to last?? " I was referring to any SHO owner with a non-nitrous setup.

Greg

 

[jthomas68]

BeatDaSHO:
I never said YOU had to use the motorcraft ones. I was talking about Petec. You use the nitrous so you are in a totally different ball field. But, whatever you say buddy.

Greg

I never gave you any kind of attitude,so do NOT call me buddy again.I was just trying let him know the Motorcraft plugs are not the ONLY ones that will fit.

 

[BeatDaSHO]

Attitude? I am just giving facts that umm i believe is probably the most talked about thing on the forum. Take it how you want it.

Greg

 

[jthomas68]

BeatDaSHO:
With this statement that i said......"Why would u go and put some crappy plugs in that aren't even going to last?? " I was referring to any SHO owner with a non-nitrous setup.

Greg

What difference does that even make?It`s not like i start the car,purge,flip the arming switch and go.It is a street car WITH nitrous,that has absolutely no bearing on anything here except that they are copper.

 

[BeatDaSHO]

Oh boy. It's not even worth arguing with you Jeremy Thomas. End of topic. Peace.

Greg

 

[jthomas68]

Later

 

[sdpatt]

jthomas68:
Actually,you do not need the Motorcraft plugs.They just work well,and have the best fit.Fwiw,i have been running el cheapo Champion copper plugs with the common problem of being too tall.I have had ZERO problems with them,and they are 2 ranges colder than stock.

You will think zero problems when those 1/16" too tall plugs let a bunch of road grit into the wells. Just don't let that stuff get into the cylinders. How often do you have to replace those copper plugs?

 

[Darkside]

Buddy, chief, champ; all very annoying words to call somebody. shoot

But back to the topic.

 

[MeShoHorny]

94ShoOff:
Buddy, chief, champ; all very annoying words to call somebody. shoot

But back to the topic.

Keep your opinions to yourself Pal wink

 

[jthomas68]

I only drive the car about 5k a year,and just put them in mid summer last year.I`ll probably change them out the next oil change(next week).As for the road grit,because my valve cover is polished,i attend to it every 2-3 days for car shows and criuse nights.There has never been any grime of any kind so far this year showing up on the cover.I`ll post if i find any i`ll affects from the plugs.This next run around,i`m most likely switching over to Zex copper plugs.

 

[pete c]

I realize that nitrous is cheap quick hp, but, sounds like it might be a good way to fry a motor. How much more power does it make? Does the engine computer do a good job of keeping the mixture from getting too lean when the nitrous is flowing? If so, I guess it might work well.

 

[jthomas68]

The SHO intake manifold is well suited for the use of nitrous.The average hp increase on these cars is 70-75 crank hp,and those are very safe levels.I personally know aobut 5 other people using a dry kit(wet WILL burn valves)of n2o,and none has had any problems what so ever.Check out www.n2osho.com for more info.

BTW,i apologize that your questions got so mixed up.The forum is a GREAT place,but as you can see,sometimes we don`t all agree
Still,you did recieve a good answer,try changing your plugs,and look for oil in the plug wells.