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Misfiring at full thottle

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JbsRedR
Posts: 23
Joined: 16 Mar 2011, 10:43
Year and Model: 96 850R
Location: New jersey

Post by JbsRedR »

Engine starts to hesitate and stops pulling. Never experienced this issue ever but also never had as many mods. Wondering fuel injectors fuel pump or spark plugs. No check engine light nothing runs smooth otherwise and idles perfect

jblackburn
MVS Moderator
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Joined: 08 Jun 2008, 15:54
Year and Model: 1998 S70 T5
Location: Alexandria, VA
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Post by jblackburn »

Might be a helpful test to hook up a fuel pressure gauge and get some readings. A bottle of Techron run through your tank wouldn't hurt the injectors, either.

When were your plugs last replaced, what kind are you using, and what's the gap set to?
'98 S70 T5
2016 Chevy Cruze Premier


A learning experience is one of those things that says, "You know that thing you just did? Don't do that."

mercuic: Long live the tractor motor!

tjts1
Posts: 673
Joined: 13 Nov 2007, 00:31
Year and Model: 96 855 NA 5 speed
Location:
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Post by tjts1 »

Change the plugs first.
Ambitious but rubbish

Alecw81
Posts: 172
Joined: 31 Jan 2011, 14:58
Year and Model: S70 GLT 1998
Location: Wilmington, NC
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Post by Alecw81 »

I had this issue after I changed my plugs, wires, cap, rotor.

In my case it was the coil.

JbsRedR
Posts: 23
Joined: 16 Mar 2011, 10:43
Year and Model: 96 850R
Location: New jersey

Post by JbsRedR »

Thanks for all your responses getting my car back Monday. I will immediately check and change spark plugs if needed first. If everything seems fine will def add some injector cleaner and look into replacement coil. What do you think of the MSD setup or ipds? It is definitely at a high rpm that I am seeing the issue I am very excited to get the intercooler and 2.5 pipework just want to prevent any issues that obviously could cause detonation

JbsRedR
Posts: 23
Joined: 16 Mar 2011, 10:43
Year and Model: 96 850R
Location: New jersey

Post by JbsRedR »

Sorry for the late response but issue has been resolved. Changed my cap, rotor and plugs ( auto lite Iradium gap set to .28 ) car is pulling so damn hard though I have to upgrade my FMIC clamps to some HD ones. This site kicks ass!! On order now msd coil and IPD wire set. Maybe I'll treat myself to a chassis dyno soon. So excited to get some actual numbers. Whoo hoo my R will be cruising down the beach this weekend with a huge smile on my face!

JRL
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Post by JRL »

*****
Mod note. Jim passed away in early 2022, his contributions to this forum are immortal, and he is missed. RIP

2000 V70R Black, 144,000 miles Wife's R.
2007 V70 2.5T White/Oak 111,000 MILES. Polestar tune, IPD bars, rear spoiler, dark grey Thors, DWS 06, HU850, sub.

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